A couple of years back, I had the particular good luck to be in the jump seat of an Iberia MD-80 in Madrid when the captain rejected the take-off at 80 knots. His ASI didn't kick-in so it was no way Jose and by jaysus did we stop fast.
Quite an adrenaline buzz in the cockpit that day. Skipper told me he had been flying jets 30 years and he never had to reject a T/O.