diff --git a/vm/builtin/nativemethod.cpp b/vm/builtin/nativemethod.cpp
index b989390..0a1f6df 100644
--- a/vm/builtin/nativemethod.cpp
+++ b/vm/builtin/nativemethod.cpp
@@ -2,6 +2,9 @@
 
 #include "vm.hpp"
 
+#include "exception.hpp"
+#include "exception_point.hpp"
+#include "message.hpp"
 #include "native_libraries.hpp"
 #include "primitives.hpp"
 
@@ -11,8 +14,6 @@
 #include "builtin/string.hpp"
 #include "builtin/tuple.hpp"
 
-#include "message.hpp"
-
 namespace rubinius {
 
   typedef TypedRoot<Object*> RootHandle;
@@ -91,7 +92,6 @@ namespace rubinius {
     return create<GenericFunctor>(state);
   }
 
-
   Object* NativeMethod::executor_implementation(STATE, CallFrame* call_frame, Message& msg) {
     NativeMethodEnvironment* env = native_method_environment.get();
     NativeMethodFrame nmf(env->current_native_frame());
@@ -101,9 +101,20 @@ namespace rubinius {
     env->set_state(state);
 
     NativeMethod* nm = as<NativeMethod>(msg.method);
-    Object* ret = nm->call(state, env, msg);
+
+    Object* ret;
+    ExceptionPoint ep(env);
+
+    PLACE_EXCEPTION_POINT(ep);
+
+    if(unlikely(ep.jumped_to())) {
+      ret = NULL;
+    } else {
+      ret = nm->call(state, env, msg);
+    }
 
     env->set_current_native_frame(nmf.previous());
+    ep.pop(env);
 
     return ret;
   }
@@ -256,6 +267,4 @@ namespace rubinius {
     }
   }
 
-
-
 }
diff --git a/vm/builtin/nativemethod.hpp b/vm/builtin/nativemethod.hpp
index 028329b..c57728a 100644
--- a/vm/builtin/nativemethod.hpp
+++ b/vm/builtin/nativemethod.hpp
@@ -20,6 +20,7 @@
 namespace rubinius {
 
   /* Forwards */
+  class ExceptionPoint;
   class Message;
   class NativeMethodFrame;
 
@@ -99,6 +100,14 @@ namespace rubinius {
       current_native_frame_ = frame;
     }
 
+    ExceptionPoint* current_ep() {
+      return current_ep_;
+    }
+
+    void set_current_ep(ExceptionPoint* ep) {
+      current_ep_ = ep;
+    }
+
     /** Set of Handles available in current Frame (convenience.) */
     Handles& handles();
 
@@ -113,6 +122,7 @@ namespace rubinius {
     NativeMethodFrame*  current_native_frame_;
     /** Global object handles. */
     Handles             global_handles_;
+    ExceptionPoint*     current_ep_;
   };
 
 
diff --git a/vm/exception_point.cpp b/vm/exception_point.cpp
new file mode 100644
index 0000000..8cddf16
--- /dev/null
+++ b/vm/exception_point.cpp
@@ -0,0 +1,22 @@
+#include "exception_point.hpp"
+#include "builtin/nativemethod.hpp"
+
+namespace rubinius {
+  ExceptionPoint::ExceptionPoint(NativeMethodEnvironment* env)
+    : jumped_to_(false)
+    , previous_(env->current_ep())
+  {
+    env->set_current_ep(this);
+  }
+
+  void ExceptionPoint::return_to(NativeMethodEnvironment* env) {
+    jumped_to_ = true;
+    env->set_current_ep(this);
+    _longjmp(__jump_buffer, 1);
+    abort(); // HUH!
+  }
+
+  void ExceptionPoint::pop(NativeMethodEnvironment* env) {
+    env->set_current_ep(previous_);
+  }
+}
diff --git a/vm/exception_point.hpp b/vm/exception_point.hpp
index 5571c26..075bd84 100644
--- a/vm/exception_point.hpp
+++ b/vm/exception_point.hpp
@@ -3,6 +3,8 @@
 #include <setjmp.h>
 
 namespace rubinius {
+  class NativeMethodEnvironment;
+
   class ExceptionPoint {
     bool jumped_to_;
     ExceptionPoint* previous_;
@@ -11,12 +13,7 @@ namespace rubinius {
     jmp_buf __jump_buffer;
 
   public:
-    ExceptionPoint(Task* task)
-      : jumped_to_(false)
-      , previous_(task->current_ep)
-    {
-      task->current_ep = this;
-    }
+    ExceptionPoint(NativeMethodEnvironment* env);
 
     bool jumped_to() {
       return jumped_to_;
@@ -26,23 +23,16 @@ namespace rubinius {
       jumped_to_ = false;
     }
 
-    void return_to(Task* task) {
-      jumped_to_ = true;
-      task->current_ep = this;
-      _longjmp(__jump_buffer, 1);
-      abort(); // HUH!
-    }
-
-    void unwind_to_previous(Task* task) {
-      previous_->return_to(task);
-    }
+    void return_to(NativeMethodEnvironment* env);
 
-    void pop(Task* task) {
-      task->current_ep = previous_;
+    void unwind_to_previous(NativeMethodEnvironment* env) {
+      previous_->return_to(env);
     }
 
+    void pop(NativeMethodEnvironment* env);
   };
 }
-#define PLACE_EXCEPTIONPOINT(ep) _setjmp(ep.__jump_buffer)
+
+#define PLACE_EXCEPTION_POINT(ep) _setjmp(ep.__jump_buffer)
 
 #endif
diff --git a/vm/subtend/ruby.cpp b/vm/subtend/ruby.cpp
index b7e3345..3a56ecb 100644
--- a/vm/subtend/ruby.cpp
+++ b/vm/subtend/ruby.cpp
@@ -20,6 +20,8 @@
 #include "builtin/string.hpp"
 #include "builtin/symbol.hpp"
 
+#include "vm/exception.hpp"
+#include "vm/exception_point.hpp"
 #include "vm/global_cache.hpp"
 #include "vm/message.hpp"
 #include "vm/object_utils.hpp"
@@ -38,6 +40,7 @@ using rubinius::ByteArray;
 using rubinius::Class;
 using rubinius::ClassType;
 using rubinius::Data;
+using rubinius::Exception;
 using rubinius::Fixnum;
 using rubinius::Integer;
 using rubinius::Message;
@@ -936,8 +939,22 @@ extern "C" {
     return value;
   }
 
+#define RB_RAISE_BUFSIZE   256
+
   void rb_raise(VALUE error_handle, const char* format_string, ...) {
-    throw std::runtime_error(std::string("rb_raise: ") + format_string); /* Yeah, not 'exactly' correct. */
+    va_list args;
+    char reason[RB_RAISE_BUFSIZE];
+
+    va_start(args, format_string);
+    vsnprintf(reason, RB_RAISE_BUFSIZE, format_string, args);
+    va_end(args);
+
+    NativeMethodEnvironment* env = NativeMethodEnvironment::get();
+    Exception* exc = Exception::make_exception(
+          env->state(), as<Class>(env->get_object(error_handle)), reason);
+    env->state()->thread_state()->raise_exception(exc);
+
+    env->current_ep()->return_to(env);
   }
 
   VALUE rb_require(const char* name) {