I'm getting married this month! What could possibly go wrong? Add answers, be as creative and cruel as you like. I won't bet (except to initialise some very low probabilities) but I might add more answers.
Resolves to the worst thing that actually happens. "Worst" is my judgement. Feel free to ask me which of two options would be worse. If there are two answers that overlap (e.g. "Somebody dies" and "the best man dies"; or "an ambulance gets called" and "an ambulance gets called because of a severe allergic reaction to the food"), I'll probably resolve to the more specific one, unless it feels really non-central and not so bad. If in doubt, ask me which one would count as worse.
If none of the listed options goes wrong, resolves Other. I'm not going to add a "nothing goes wrong" option, because even though I'm an optimist and I'm confident it'll be a wonderful day, the line between "nothing goes wrong" and "something extremely trivial goes wrong" is very fine, and part of the fun is guessing just how trivial the worst thing will be.
The venue is in Scotland and there will be about 100 people. There will be fire, hours of dancing, outdoor parts, a bridge, children... lots of hazards!