hey, i said this at my brothers wedding...i was the best man....it was pretty darn funny...i said it like this..
"before i get started, if anyone is feeling nervous, sick, or nausous, its probobly cause you just married dave" (dave is my brother obviously)...
that was a great joke to get the crowd warmed up... i had them laughing like crazy the whole time... use that...i am a naturally funny person, so it worked well for me...then start dancing like this guy....i had 2 shots of jegermeister before my speech and did it perfect...but thats just me...