According to Nick the Tooth, who, according to extensive (really not that extensive) searches, is someone who works closely with Dana White, the UFC president suffered a “bad attack” on stage during an award ceremony in Ireland:
DUBLIN: @danawhite suffered a bad attack during the Trinity award ceremony, thx for support & understanding, we’ll be back soon, luv u guys
— Nick the Tooth (@nickthetooth) February 12, 2013
The attack was apparently a relapse of White’s Meniere’s disease which he has been battling for years.
White had to be helped off the stage but is reportedly okay.