Sorry about your bro...
I wouldn't want to animate either if I lost one of my brothers.....
Anyway, about your animation. I would say that in terms of animation-motion you've got that down. However, if you're gonna make jokes, you've definitely gonna need more comical facial expressions for your characters. Also, I would suggest you add a bit more colour to your characters, a bit more shadow on different areas (experiment with this) so they look more 3D (unless you were actually aiming for 2D). The shotgun thing made me laugh, but longer would be better next time. Kudos and good luck.