Well, I can't say I've done that, but I have walked up to and tagged a deer almost... she ran off just as I was within a fingers width of her.

I'd like to try that again, but there's not actually too many places in the UK with wild deer, most of them are in wild-life parks and are so used to humans they'll come up to you and scrounge food, obviously they don't count. Actually, getting away from them is more of a challenge!