In the movie, Old School, Will Ferrell had a now famous scene where he goes streaking. Not only did he have to stand naked in front of hundreds of extras, crew, and fellow actors, he had to run down the street in public over-and-over the whole night.
Here’s what Will Ferrel said about the filming that scene:
“This street, it's in Pasadena, kind of looks like a main street, so they had all of these pretty little storefronts. One of which was a gym – after work, everyone's getting their workout in, 6:00 at night and people on the treadmills, right in the window. No one has told them there is going to be a man running naked. The first take, I'm running, doing my lines, but I'm hearing muffled shrieks [screaming] it's the people on their treadmills screeching! And by the third take, everyone was gone - they cleared out.”
Thanks for reading: Which was the most uncomfortable scene an actor ever had to shoot?, Sorry, my English is bad:)