I've open folded AK at bubble with under 10bb before. I was short rolled at the time and the game was a ticket only event; cashing the bubble was worth around $50 iirc, comparable to my BR at the time, which I wasn't prepared to gamble with AK considering I'd been through a qualifier and of course many hours of this game just to get this far. I went on to finish 2nd for a $4k payout, so I'm never going to see that as a mistake, even if I know it's an easy shove 99.99% of the time.