Jesse McCree is, like, AMAZINGLY good at stealth. That’s why he was recruited to Blackwatch. When he wants to, he can move perfectly silently. 

This was an asset in the field, but it was becoming a serious problem on the base, because you had all these trained soldiers with hair-trigger reflexes who reacted badly to people appearing suddenly behind them.

They ended up making him wear spurs so they could keep track of him. If he ever takes them off he’s a ghost. 

Headcanon accepted.