And here I thought I was the only one it happened to. I never even knew there was an actual word for it.

It happened to me one time at a friend's house and it totally sucked. I just stared at the computer screen for probably a good 10 minutes without saying a word. I don't know if a whitey results from high anxiety or panic attacks, but I couldn't think, couldn't move, all's I could do was sit there and wait for my high to wear off. I think I kinda freaked everyone out too. I know I'd be freaked if I saw someone go pale white after smoking.