When it’s a nice sunny day out and you want to go have a nice fetch with a stick with your small dog, say like a 26lb dog, don’t hold on to that stick past the critical point.
For when Fido decides he’s had enough, oh he’s going to get that stick, and he’s going to choose the moment you decide to hold the stick at crotch level. That’s right, my friends, you’ve passed the critical point and that little 26 lb fuzzball of furry is now charging, breaking the sound barrier, launching himself at the last moment at your critical point. It’s all over. You will go down, and he will now be the master of the stick.