I'll start.
Telling someone to "Make sure the safety is off" on a Glock - (Source: Walking Dead)
Brandishing a SAO (or 1911)-type gun with the hammer obviously down - (Many sources, but here's one)
Unlimited Ammo - (Many sources, but here's one)
Every single gun makes the "CHK-CHK" sound like a pump shotgun
Gaming - Tossing away half-fired magazines, but your ammo doesn't reflect what you threw away
Gaming - The chambered round is rarely counted on your "current ammo left in mag" counter
Gaming - Doesn't cycle the action/forward-assist after reload (Counter-strike does this, for one)
Guns rarely, if ever, jam
Telling someone to "Make sure the safety is off" on a Glock - (Source: Walking Dead)
Brandishing a SAO (or 1911)-type gun with the hammer obviously down - (Many sources, but here's one)
Unlimited Ammo - (Many sources, but here's one)
Every single gun makes the "CHK-CHK" sound like a pump shotgun
Gaming - Tossing away half-fired magazines, but your ammo doesn't reflect what you threw away
Gaming - The chambered round is rarely counted on your "current ammo left in mag" counter
Gaming - Doesn't cycle the action/forward-assist after reload (Counter-strike does this, for one)
Guns rarely, if ever, jam