Found a clip on youtube I really like called UK TV Proves fmff. It's a 30 second clip with three subjects testing laughing control. They're tied to a big wooden chair in jumpsuits and barefoot and tickled by a female lab tech with feathers and fingers. It's mostly UB but the cute redhead has her feet tickled with the feather and has great reactions, in fact the narrator says she has the most trouble in the scene. All are ticklish, 2 girls and a guy, I like it and hope some may,also. Enjoy and have a great day!