Someone Shoot Me!

Real-life situation, this time. I was at work the other day and had just done something. I needed to tell a coworker he needed to do it as well, but he was on the phone at the time.

Not wanting to wait around til he was done nor interrupt his conversation, I got his attention and gestured. First, I gestured the way I had came, then I formed my right hand into a gun pointing directly at my forehead and mimed pulling the trigger. My coworker nodded, finished up his phone call, and went to get it taken care of.

I wasn’t telling him to get himself killed, so what was I telling my coworker to do?