Credit: John M. Heller/Getty Images

Bill Nye had a bizarre night Tuesday.

The host of the Emmy-winning 1990s TV show Bill Nye the Science Guy, 54, collapsed mid-sentence in front of hundreds of audience members during a speaking engagement at the University of Southern California.

About 10 seconds after his fall, "he popped back up with much gusto and asked everybody how long he was out for and went on with a story about how a similar thing happened to him that morning," an audience member tells the Los Angeles Times.

Some people Tweeted that Nye fainted more than once and demonstrated slurred speech.

Around 8:40 p.m. paramedics and USC's department of public safety arrived -- though it's unclear if he was treated.

Nye attempted to finish his presentation -- refusing a chair and taking sips of water -- but began slurring his words and stumbled against his laptop, the audience member tells the Times.

He was eventually removed from the stage.

No worries, his rep tells USA Today: "Bill Nye is feeling much better after a good night's rest. He says he pushed himself too hard after a long day of an early satellite media tour combined with a late night speech. "