Yeah, I figure they just never had anything trigger the TOS or TOS like sx..

In my 20s when helping dh hang sheet rock on the ceiling, I always wondered why I couldn't hold my arms up as long as he could...
I kept having to change arms or use my head/neck to hold it up so he could nail it.. later we learned the pros use a "deadman" 2x4s to prop the stuff up overhead, boy we were dumb doing it the hard way LOL