Luke has done that twice. Second time, once I realized he wasn't hurt, he got no sympathy from me. I fixed the keyboard shelf, but it still slants too much.
Yikes, 666...
Once, Matthew climbed up onto the top of my computer to get some chocolate and broke the entire computer desk! I went running in and found him unwrapping the chocolate, the glass screen of the monitor directly over his head, dangling by the cord.
I shiver even now, thinking about it. He was probably two.