Best tickling you've ever witnessed?

Hey guys, what was the best tickling experience you ever witnessed in real life? I'll go first, this was the first proper tickling i ever witnessed and I was only a kid at the time, but this is what I remember.

I was about 8/9 and my family were on holiday in Spain. It was a typical family hotel full of British tourists and I was walking back from the kids arcade near the swimming pool area to the hotel room at around 11pm. The swimming pool was shut at this time, so not many people were around and it was relatively dark, but there were snooker/pool tables that you could still put money into and play if you wanted. As I was walking past I heard people laughing and talking around one of the snooker tables and decided to look at what was going on. I was partially hidden behind a half-wall with flower boxes, so I don't think they could really see me unless they'd looked right at me.

What had happened was four of these boys (I'd say aged around 18/19/20 but it's hard to tell ages correctly when you're a kid yourself) had pinned this girl around the same age on the pool table, holding her arms above her head and teasing that they were going to tickle her. She was going absolutely mental, begging and laughing before they were even doing anything and at this point I couldn't stop watching. They wiggled their fingers towards her armpits, saying "cootchie cootchie coo!" and tickled her all under her pits and over her tummy while she was screaming and laughing! They started to take it in turns blowing raspberries on her belly when one of them looked up and I think they saw me - needless to say I ran as fast as I could back to my family in the hotel room and didn;t stick around to see if they were coming after me or not! Didn't see them for the rest of the holiday but it's safe to say I didn't sleep all night for fear of these guys hunting me down and tickling me! Looking back they were probably friends and were just tickling her as a prank or something but I thought they might have captured her and just tickle tortured her for the hell of it. The whole thing probably only lasted about a minute but part of me likes to think they kept her there longer than that! One of the earliest experiences that drew my attention to tickling though!

edit: spelling