advice for dealing with an angry burpee?

Steffanie
My son is a happy baby... EXCEPT about half the time when we take the bottle out of his mouth and burp him. Then he gets red face, vein popping, blood curdling scream mad mad MAD. 
Any advice?
The irony of it all is that he doesn't even cry before a feeding... He grunts and puts his hands in his mouth... Literally the only time he cries is when we take the bottle out to burp him.