Last month, SK618 from GVA to CPH. We lined up for take-off, captain revved the engines, released the brakes, and the plane started rolling. But after a couple of seconds the engines were abruptly throttled back and after rolling down the runway for a bit we executed an awkward tight turn onto a taxiway and wound up last in line again.

Never got an explanation for the incident. (But I wound up in an SK-paid hotel room in Copenhagen, since I missed my last flight home. Again! Abysmal on-time stats for that flight...)