There's been two. The first one, I was at a New Year's Eve party in a weird permanent marquee. We were having a great time but the crowd was definitely a bit dodgy.
At some point just after midnight a Range Rover drove through the wall and three guys got out and started shooting.
There was a massive stampede as we all tried to get out, when we got to the car park the whole front row of cars had had their windscreens smashed.
I remember crouching down in a field near the venue (which was sort of a clubhouse for football) as police hovered overhead in helicopters, guns still shooting and ringing my Mum to tell her what had happened but I was fine.
The second was six years ago, on a flight and the landing gears weren't working (I can't remember whether it was not going up or not coming down). We had to make an emergency landing after circling over the coast for hours and doing a mega fuel dump.
It was full on "heads down feet back", air stewards sobbing as we came in to land on one set of wheels.
I remember hearing just after we got off the plane that they'd shut all the motorways around Gatwick in case we couldn't make it back to the runway.
Ringing my mum (again) and her saying "you're meant to be in the air! penny drops oh shit, you're on that plane I'm watching on sky news right now aren't you?"
Still got on the rearranged flight the next day, figured I'd had my one in a million chance of plane crash.