So I am checking on my little side garden (in the flower bed) where I grow my jalapeno peppers and found this.

The peppers were both on the same plant.  I can't seem to find out if maybe they are hybrid or something?  Very puzzling.  I thought the light green pepper was a banana pepper, which my husband loves, so I sent one to work in his lunch.  Guess what?  He said it was "too hot to eat".  So maybe it is a hybrid?  Any explanations would be appreciated. 
s