Usually you don’t see gag reels in video games, but now with the advent of motion capture, it’s definitely on the table.
The above video is from Team Bondi, the guys who worked with Rockstar to make LA Noire the fabulous title that it was. As with any acting gig, the actors being motion captured flubbed their lines on occasion. Presumably during a period of boredom, Bondi dug up some of that old footage, and applied it to the models in the game.
No, the animation isn’t perfect the way it was in the game, but it’s good enough to be hilarious, and I highly suggest you watch the whole thing above.