He was looking at the device during the whole conversation, with a look of confusion and concern. Then he held the time travel device away from his body for the guy to shoot at it, and he shot at the man instead and said "wut!?"
If you're not able to get what's going on after seeing that, then you're pretty stupid. Point is, they didn't overlook this detail.
2 years ago I thought the "horse porn" thing was just an exaggeration, or at least something that only a small minority fapped to...and then....My Little Pony became popular, and the rest came naturally :(