I'm no expert on guns, but when Mr. Pink is being chased by the cops in the getaway scene, he uses the car as a shield and fires at the cops. I counted over thirty shots fired from Pink's gun alone.
Also how did Mr. Brown die? He said the cop shot but where he was conscience before Mr. White killed the two cops in the car. Did Orange have something to do with it. Did he get shot in the head? If so he's really really lucky.
One last thing: it's not really a blooper, but when nice guy Eddy is talking on his cell phone, about a setup he runs over an orange balloon (foreshadowing about Mr. Orange?)