Forget Bad Teacher. Actor Jason Segel was a bad eater. The How I Met Your Mother sitcom star is currently promoting his new flick with actress Cameron Diaz and openly discussing his battle with the bulge. While those extra pounds may have been a health hazard, it was actually a shocking photo that inspired him to get on the weight-loss bandwagon. Segel recently dropped a whopping 30 pounds, thanks to the help of his assistant. The actor told David Letterman that his "aha" moment came after the said assistant took a snapshot of Segel while he was sleeping. Segel explained, "My lowest moment came [when] I shot a movie in New Orleans. New Orleans is like, the best food and booze anywhere ... I really took advantage of it." But it was the night he made a run for the border that really changed things. According to Segel, the assistant found Segel passed out, covered in Taco Bell wrappers with his giant beer belly hanging out. As the 31-year-old told it, "She took a bunch of pictures to show me what I had become. That's my former stomach." Letterman agreed that the unflattering photo leaves a lot to be desired, telling the Forgetting Sarah Marshall star, "Honest to God, Jason, this looks like a crime scene!" We're guessing he won't be landing a role as a Taco Bell spokesperson anytime soon.