I was like 22ptbb/100 in 2k hands of headsup, feeling pretty good about myself, then this session happened:
Set < flopped straight, combo draw < set, overpair < semi-bluff, TPTK < bottom pair that runner-runners flush all-in in turn, TP and nut flush draw < 73o two pair... each pot over 200bb. I don't think I was fundamentally outmatched, since villain was way too loose OOP and in re-raised pots, but I was making way more blind bluffs on pots than I normally would, out of frustration, and that cost me at least a buy in or two.
I didn't think it was possible to lose that many BB in that many hands. Maybe headsup has a lot of variance, huh?