Just in case there was a question in your mind about how awesome Mariano Rivera is, the following tweet should settle it for you: https://twitter.com/AnthonyMcCarron/status/408249756608364544
Mo was appearing in Manhattan and acting as one of Santa's helpers for Dick's Sporting Goods near the Flatiron building (I'm not sure if there is a store there or if they just have a truck set up in the area for this event). He was asked a bunch of questions but the answer in the tweet above was by far my favorite.
He also said:
And this is what he looked like: