youtube link: http://www.youtube.com/watch?v=zzNs4-kRLaE
second 1.48 - 1.53

Sound : I choose On the team
My concept : There is a Doctor performing surgery on a patient by himself. The doctor need some assistant but no one around except the janitor.
The doctor tell the janitor to join his team and soon as he did that , the janitor gone crazy laugh and hit on the head of patient and take out knives.