I've noticed a few milestones grant XP when you inflict stress on allies, especially emotional. It's meant to simulate lashing out at friends and teammates, right? But you have to roll for it - there's no situation where people just take emotional stress because you're mean to them.
It seems to me like most players won't attack their allies in order to cause emotional stress. Especially when that stress could make the next action scene even harder!
But then again, I guess that's why you get XP. It's a thing you wouldn't normally do, so there's a mechanical reward for it. That makes sense to me.
Is there any way for the watcher to step in and help this process? Like, a character tries to do one thing and fails, but the watcher uses their reaction effect die to inflict emotional stress to a teammate and causes you to hit your milestone?