One the most random and funny ones has to be when someone looked over at me in a shop, sad '3,2,1…' farted loudly 'you're back in the room!'.
Creepiest was probably when I was on a night walk, someone walking my way was walking very strangely, I thought they must be drunk. As they passed me they said 'all fated to die one day', chuckled and just kept walking.