Breaking Your Toe In Your Sleep

How do you break your toe while you're sleeping? I don't know, but I've apparently managed to do just that. Went to bed Saturday night with all bones connected and whole, woke up Sunday morning with a broken big toe that has kept me in pain all day because I had no choice but to be on my feet most of the day.

Makes me wonder if I've been roaming the nighttime world in my sleep...

Note: That is NOT my toe in the photo, but only a graphical representation. My foot is too damn ugly to put on the Internet.