Yes, that doctor is Dennis from It's Always Sunny in Philadelphia.
Whoa. I did not see this coming. Apparently I'm mad late on this, but a sequel is being made to one of the most bad-ass underrated action movies of 2006. Here's a clip for the non-believers.
/Film has more than a few details on the sequel straight from the movie producer's mouth. Crank II will start shooting in April and based on the ending of the original movie, I can't imagine what crazy sh*t they are gonna come up with to explain how this movie is even possible.