i've told a thread partner on two separate occasions that i wasn't feeling a thread and could we drop it. we might have slapped sudden conclusions on them or left them how it was, but we kept threading.

of course, we thread all the time and i wasn't an asshole about it ("This thread is boring" will absolutely piss people off. "Not feeling this one, let's do something else" won't), but no negative repercussions here.