There are so many great scenes. One that 1st comes to mind is Haystack Hysterics from Tickle Paradise. The one model (used to be called Gabby at FM) is being tickled and it's so intense she brakes character - which she's never done in a tickling video before - and begs for a cut becuase it tickles too much. That was cool!
MTP had a good scene where two blonds are in stocks together (Dita & Ashley I think), one older the other. They're both getting tickled intensely, but the younger onse seems to be really sensitive and yells out "Ashley!!!" out of panicked insanity, and the older one just leans over and kisses her cheek to comfort her - the only thing she can do as she's also immoble in the stocks and about to be tickled. It was sweet and sadistic at the same time.
THe VERY first Tied and Tickled - Jennifer Brooks/Michele Bauer spread eagled and tickled on the red satin bedsheet as she goes CRAZY ... back in '86 I had never seen anything like that, and it was intense! I was shocked and wondered "How can anyone even take something like that?" In her case I still wonder....
Gosh, lots of good ones are coming to mind now, more TMF scenes, FM, RealTickling, TP, SOA, The Laugher, ANA......
Hmmm.... nothing from Decon Blue however!