It MIGHT happen if she was horny before getting on the ride, and already aroused, and the sensation kinda finished her off. But that seems unlikely based off her behaviour before the launch.
Plus, I doubt the restraint was THAT close to her. I mean, it'd have to be really damn tight against her. And if it is, then why isn't the guy crying out in pain if its equally tight on his side?
Looking at the video again, its more likely the tight pull of the belt made her clothes tight against her crotch, and if she was wearing a thong...well....
Based off my own experience, no, never had that happen. Rides with that kind of restraint crush my boobs too much, and my boobs aren't extremely huge or anything.
The closest I've felt to a feel-good kinda sensation like the one she's supposedly feeling is caused by the most unlikely thing: the monkeybars. lol. Yup. I remember being pre-teen and hanging by my knees off the bars, and it felt good around my groin. I remember it feeling kinda tingly. It was weird, and yet, I'd get up there and just hang around....haha.
Now I'm wondering if I hung upside down on the monkey bars today, if I would get that same sensation.
haha, hmmm.