Gotta be honest, I don't like people trying to go about their day being disrupted for the sake of a silly video. Even if I thought the jokes were funny, that would have ruined it for me. And they left in the part where they were asked to leave! They're proud of it!
When I originally played it back in the day, there was one scene, combined with some "gameplay decisions" which had me completely lose it.
On the mission where you have to assasinate Lebedev in the airport, when you finally get to him on the airplane you start a conversation, but are interrupted midway by your fellow agent Anna something, who proceeds to kill Lebedev. Well since this wasn't my first playthrough, I knew where the whole thing was headed so I decided to plant some LAMS on the approach to see what would happen.
And what did happen was one of the funniest scenes in a video game. You hear Anna's footsteps, the camera angle change from the dialogue-style camera to a zoom out, and JC turns to the hallway she is coming from. LAMs go off, Anna lets out a scream, JC turns right back to Lebedev and just continues chatting as if it was some type of minor disturbance