I'd say the most embarrassing thing I do is randomly say things that are... completely out of context

I could be walking or just sitting somewhere and randomly go peekaboo, or meow, and then laugh out loud- thinking it's the funniest thing ever

plus: I insist that the dog goes meow, and the cat goes woof woof (completely genuin). when people tell me otherwise I'm like well, that's what the teacher told me, if you don't believe me, ask the zookeeper

something else is shaking random people who are asleep to "check" they are alive

big fear of mine.. people dying on me, though I've mentioned this in other threads