I guess the only rule here is nothing super huge, gotta be something small that you still look back on from time to time.
One of mine, and the first that comes to my head, is this one time I was in rural Ireland. There was a pasture full of cows next to a church my group and I were at for a wedding, and while waiting for things to start I got drunk and bored. Decided to get up close to the cows since I'd never seen one in person before that close.
Cow came up to me all friendly like, started licking my face, nibbled on my tie a little bit, and then I backed away. Not before getting a sweet pic of me an the cow kissing tho.
I named it Gertrude.
A sort of recent one: I was longboarding up a hill and as I reached the peak, I looked to my left and saw an eagle about 5 feet away from me. It spread its wings, took off and flew through my windstream as I descended the hill.
A week later, while skating at a different park entirely, another massive bird of prey swooped down and glided alongside me. I didn't get as good a look at it, but I like to imagine he was the same eagle from before popping by for a visit.
THe eagle is now your comrade. Use your powers wisely.