diff --git a/main.py b/main.py
index 9a285be..4e8fa71 100644
--- a/main.py
+++ b/main.py
@@ -1,4 +1,36 @@
-import unittest
+from rainbowadn.testing.instrument import *
 
-if __name__ == '__main__':
-    unittest.main('rainbowadn.testing.test_all')
+
+class Print(Instrumentation):
+    def __init__(self, target, methodname: str, msg: str):
+        super().__init__(target, methodname)
+        self.msg = msg
+
+    def instrument(self, method, *args, **kwargs):
+        print(self.msg, end=' ')
+        return method(*args, **kwargs)
+
+
+class C:
+    @classmethod
+    def m(cls):
+        print('m')
+
+
+with Print(Instrumentation, '__exit__', 'exit'):
+    print1 = Print(C, 'm', '1')
+    print2 = Print(C, 'm', '2')
+    print3 = Print(C, 'm', '3')
+    C.m()
+    print1.__enter__()
+    C.m()
+    print2.__enter__()
+    C.m()
+    print3.__enter__()
+    C.m()
+    print1.__exit__(None, None, None)
+    C.m()
+    print2.__exit__(None, None, None)
+    C.m()
+    print3.__exit__(None, None, None)
+    C.m()
diff --git a/rainbowadn/testing/instrument/instrumentation.py b/rainbowadn/testing/instrument/instrumentation.py
index 4e5d301..e5f9c27 100644
--- a/rainbowadn/testing/instrument/instrumentation.py
+++ b/rainbowadn/testing/instrument/instrumentation.py
@@ -22,13 +22,18 @@ class Instrumentation(Generic[IType]):
         raise NotImplementedError
 
     def __enter__(self: IType) -> IType:
-        assert not hasattr(self, 'method')
+        self: Instrumentation
+        assert not hasattr(self, '_method')
+        assert not hasattr(self, '_wrap')
         method = getattr(self.target, self.methodname)
         assert callable(method)
         self._method = method
 
         @functools.wraps(method)
         def wrap(*args, **kwargs):
+            nonlocal method
+            while method in self.deinstrumentation:
+                self._method = method = self.deinstrumentation.pop(method)
             return self.instrument(method, *args, **kwargs)
 
         self._wrap = wrap
diff --git a/trace.py b/trace.py
index bbe9847..52ec884 100644
--- a/trace.py
+++ b/trace.py
@@ -139,7 +139,10 @@ async def _instrument(bank: BankChain) -> list[Instrumentation]:
 
 class DeintrumentationSize(Instrumentation):
     def instrument(self, method, *args, **kwargs):
-        print('deinstrumentation size', len(self.deinstrumentation))
+        print(
+            f'deinstrumentation size @ {target_str(self.target)}:{self.methodname}',
+            len(self.deinstrumentation)
+        )
         return method(*args, **kwargs)
 
 
@@ -152,7 +155,10 @@ async def _trace():
     )
     bank = await _migrate(bank)
     set_gather_asyncio()
-    instrumentations = await _instrument(bank)
+    with DeintrumentationSize(Instrumentation, 'deinstrument'):
+        with Counter(DeintrumentationSize, 'instrument') as de_ctr:
+            instrumentations = await _instrument(bank)
+            print(jsonify(de_ctr))
     print('traced')
     return instrumentations