PARK CITY, Utah - Actor Patrick Dempsey wanted to do something "completely different" with his new film "Flypaper," so he signed on as one of its producers.

While promoting the movie at the Sundance Film Festival this week, The "Grey's Anatomy" actor described the experience as sometimes "painful," where there were days he "didn't want to show up." In the end he believes pushing himself outside his comfort zone was a good thing.

"Flypaper," a comedy about a bank robbery, also stars Ashley Judd and Tim Blake Nelson. Dempsey believes the outcome of the experience was "very good" and would "probably" produce another film in the future.