In the star studded comedy Knocked Up, the opening sequence introduces a group of laid back, fun-loving friends. The group played by Seth Rogen, Paul Rudd, Jason Segel and Jay Baruchel head to an amusement park to take on thrilling roller coasters. For this scene, the stars headed to Knott’s Berry Farm and took a ride on Xcelerator, Silver Bullet and Supreme Scream. In real life, Jay Baruchel is deathly afraid of roller coasters and could only do one take on Silver Bullet before bowing out. In this clip, you’ll notice that he only appears on one roller coaster and the fear in his face is not an act.