Thought I'd give this a go. Frame by frame in GIMP, took me way longer than I'm willing to admit…
motiontrackedboobs
original: redgifs.com/watch/FlatShadyHarrierhawk
LollyPop
Addison
[Request] Jessica Nigri (Pre-Op)
Dee Dee Lynn Motion Tracked
[Request Fulfilled] Slo-mo in Sunglasses and Latex
[Product] Hannah Hilton
Teal Conrad Bounces During Camshow
Bouncing in the Back of a Van
Request Granted: Side Boobs
Wow Girl (Motion Tracked)
A very bumpy road
She's So Silly
[Request Fulfilled] Sabrina Nichole's super bouncy boobies
Jessica Nigri from mail Monday [response] (more in comments)
Aloha
Request Granted: More Kate Upton
Jump Rope
Sweet Motion
Anchors away!
With the hand
Lindsey Pelas
Request Granted: This perky princess
Request granted: Katy Perry jumping.
All Natural Jiggle