Roy drops on the sidelines . . .

He's had this happen multiple times now. Surely there's a diagnosis for it. Could be low blood pressure (which can make you faint, especially after sudden movements), but they'd best get that checked out and rule out anything bad.

from ESPN
Roy Williams taken to locker room due to vertigo, 'doing OK'

When it happened at KU, wasn't it always after rising from a crouch?

I don't remember it happening at KU, but yes, almost every time I've seen it since he's been at UNC it's been him coming up out of a crouch. (I used to have low blood pressure, and that can happen when you rise too suddenly--hence my mentioning that)

There was one time, though, where he was just standing near the scorer's table and went down. Tonight he seemed to make a rapid motion and then went down.

I have it, too. Happens to me.

I seem to remember Roy had 2 or 3 such incidents at KU.