April 5, 2011 at 1:35 PM ET
Warning: While reading this post, you will desperately want to yawn. But you'll be too scared to do so.
A boring lecture in a college class prompted a big yawn out of one of the students -- a yawn that ended up unhinging the girl's jaw, locking her mouth in permanent slack-jaw position.
She ended up in a nearby hospital's emergency department, where the BBC show "Bizarre ER" was there to film her bizarre treatment: A doctor stacked 26 tongue depressors in her gaping mouth, which caused the poor girl's jaw muscles to tire, allowing the doc to set her jaw back into place.
We guess that's one way to get out of a dull class.