diff --git a/pytorch_lightning/pt_overrides/override_data_parallel.py b/pytorch_lightning/pt_overrides/override_data_parallel.py
index 5e0150ee5b..bc2280f3d2 100644
--- a/pytorch_lightning/pt_overrides/override_data_parallel.py
+++ b/pytorch_lightning/pt_overrides/override_data_parallel.py
@@ -1,5 +1,6 @@
 from itertools import chain
 from torch.nn import DataParallel
+import pdb
 
 
 class LightningDataParallel(DataParallel):
@@ -8,6 +9,7 @@ class LightningDataParallel(DataParallel):
     """
 
     def forward(self, *inputs, **kwargs):
+        pdb.set_trace()
         if not self.device_ids:
             # -------------
             # MAIN CHANGE