Yup! They do! SO funny. Silly kitties! It's like they are saying, "Whoo hoo, I feel lighter now!" Angel will "gallop" around the house after he does that sometimes too. Cracks me up!
My RB kitty Chynna used to race around after she pooped too! I haven't seen Abby, Spencer or Katie do it though. It sure is funny to watch! Ears back, that wide-eyed look and running place trying to get traction on a wood floor before take off! LOL