The worst was the guy I ran into doing switchbacks gradually down the length of a fire trail while listening to some podcast where guys yacked about football except it was half Starbucks ads. After the fifth time he passed me in twenty minutes I started making passive agressive comments about the invention of earbuds. Don’t know why he couldn’t just run either the entire thing or the same part of the trail but he was effectively bracketing me for a good chunk of time.