It's considerate to watch someone's back for them.
Nathan and Adam are friends who occasionally spot each other at the gym while using heavy equipment.
Nathan wants to invite Adam to work out with him.
Agreeing to spot Adam during his workout, Nathan notices the barbell's slipping and catches them.
After agreeing to spot Adam during his workout, Nathan ends up walking away while Adam uses heavy barbells.
Adam is saved from being hurt and thanks Nathan for being there.
Adam hurts himself after his barbells fall on top of him.