My 2 are also like that - they actually chase each other so fast that they only stop when one of them slams into something LOL Then they star all over again.
And yes they love wrestling on our laps.
Today when I came home from work I took them outside to play because they had been in x pen all day. They ran and chased each other for about 15 mins LOL it was hilarious - my little boy is 3 lbs and girls is 5lbs. He would chase her first then he'd stop and realize... ok this isn't a good idea she's going to come after me in a bit. Then of course she would turn around and chase him his only escape was hiding in between small palm trees LOL LOL LOL
