I've seen Stallone in person. Bumped into him years ago at a bar in West Hollywood. Geez, I can't remember exactly where it was?... Club Seven maybe?
I was just sitting at the bar with my girlfriend at the time, waiting for my drink, and looked just to the right of me and suddenly realized I was brushing shoulders with Sylvester Stallone. I didn't want to be a jerk and hound him so I just gave him a little knowing head nod. My girlfriend freaked out... lol.
One striking thing about him.. he's surprisingly short! Well, maybe not SHORT short, but MUCH shorter than you would think from how he appears in his movies.
I checked the internet and it has him listed at 5'10"... I'd call that VERY generous, he struck me as being closer to 5'6" or 5'7". He was shorter than I am, but taller than my girlfriend, who was 5'5". He was wearing a coat so I couldn't really see his physique, but he was height/weight proportionate and, as such, was not all that intimidating a presence.