Um... sorry, I don't see how an ordinary flag beatdown on a guy who looks like he isn't playing is funny...
The sneaking up concept isn't that great sorry. If it was at another angle with certain effects it could be better. It's only a 1/5 from me though sorry!
I can see why he thinks its funny. The blue team guy stole the red flag. Hes then creeping up on a completely unsuspecting Red soldier, who is about to have his own Flag's shaft driven through the base of his skull. I can see why he things its funny. I would say its humorus, and somewhat ironic, but not "funny".
woulda been better if the red guy was shooting, cuz i bet that guy wasnt playing. but that flag is HUGE! (enlarge the pic and ull see)