Not amazing, but not bad at all... I like it.
Pretty funny! Could be colored though, and perhaps a bit longer, like perhaps the shopkeeper could ramble on about what else the thug did wrong.
It's short and a funny bit, but some voices would really make the difference in the delivery of the punchline.
Decent animation. Not very humorous.
More importantly, "whom" would have actually been incorrect in that sentence. The gunman had it right and was perfectly justified in killing that disgrace to glorious Grammar Nazism.