Its animations like these which make me thankful I don't live in a place which deals with mosquitoes. Those fuckers are annoying as hell, and you made that point crystal-clear.
Main criticism of this is the bloodied bullet hole in the ending shot - seems there's some wonky depth issues on that one.
Sidenote: You could've easily put the entire animation on here - far as I can tell, none of the music you used is copyrighted.