What is your "trigger" for interference?

[IRISHMAFIA]

Originally posted by Mike Follett
I agree with the majority that you spoke to at your touney.
I've got to see some obvious sign that the runner is trying to impede the fielder's play on the ball. Just running by (close) in advancing to the next base, is not gonna get the interfence call out of me.

Ditto with a caveat. If the runner hesitated, and in my judgment (God, I love those words) did so for the express purpose of timing the passing with the ball approaching the fielder, I'm going to give every benefit of doubt to the fielder.