What should I do if I stepped on my cat?

If you feel that a significant amount of weight or pressure was exerted on your cat, you will absolutely want to take him your cat to the vet and have it checked out. This is especially critical if your cat is exhibiting any signs of injury or bleeding, acts in an abnormal or lethargic manner, vomits or cries. Cold packs can also help with bruising and pain.

People have killed there cats by just stepping on them accidently.  They may not die quickly either, since getting stepped on usually causes internal injuries that can't be noticable from the outside.   So if you are even the slightest bit concerned that you might have done damage to your cat, do what's best and take your cat to the vet immediately!