When a cat is preparing to jump on your lap, its highly evolved brain conducts an array of complex geometric calculations to help assure a successful launch and soft landing on the target. However, these calculations are dependent on the target remaining in the same position as at launch during the cat's boost and terminal phases, since its ability to conduct midcourse corrections is extremely limited. Therefore, any shifting of the target lap can easily result in landing error, requiring the cat to deploy its emergency braking system, with the result being both pain and sometimes blood on the part of the target.
And my son joined in this time. And did 100 himself. He's 11. So you have to donate now, otherwise you're just watching a child suffer (his actual words)