Knockback, Weight, Armour and low ST

[Bruno]

One of our cats was 24 pounds when we adopted him, but he was Very Fat in GURPS terms (or worse). My neighbors had a 28 pound cat, on the other hand, that was a healthy, intact male, active outdoor cat, a Maine Coone which is a breed notorious for being very big, particularly the males. And yes, that's rapidly approaching the size of a bobcat, he was a serious cat.

On topic, we use HP instead of ST, no particular damage done to our games, and we cap it at 1 yard, because otherwise a HP 1 creature suffers negative knockback, which offends me just as much as the DIV BY ZERO error a HP 2 creature gets :D

This does mean you can probably drop-kick a small turtle one to four yards, depending on your damage roll, poor turtle. That's pretty reasonable, if cruel.

Those low HP creatures are usually going to be crippled or killed by any attack significant enough to cause knockback, so the details of where they stop moving usually stop mattering very quickly.