Our family once had a cat taken in from the alley.  Meaty like a body builder, not bony and fat like a typical house cat.  One time I rustled my fingers under a newspaper.  The cat got the owl look in its eyes and then finally pounced.  Its chest flattened my hand with its full body weight, I felt both upper and lower teeth trying to bite the back of my hand and I got multiple claw skin punctures. All in a simultaneous instant.  Mouse or larger wouldn't stand a chance.  That cat grew up tough and mean.
Our regular house cats would just swat in fun, not even a claw out.  An orange kitten we kept basically turned into a fat Garfield.