I had the same 88

Flop 8AA
Turn 8
River A
(It was a limit game, hence no earlier all-in's)

BUT, in the scenario yesterday, I would have gone all in as soon as I got the 4th 8.
I find it hard to believe that the other player, supposedly a 'non poker player', hit the straight flush on the turn and then took 5 seconds to decide just to call. My bet is he had squat