Yep, most guns don't fire without pulling the trigger. But the OP did apparently point the gun in a safe direction, so credit for following one of the three rules (of Jeff Cooper's Four Rules) that applied in that situation.

Your dad was lying on the floor while you had a friend showing you, oh expert marksman, a gun? Why was he on the floor??

The OP clearly said the bullet went through the floor. Assuming they weren't in the basement, it could have struck somebody. Also, I'm not the friend in the FML; this was a parody.

Lol! I was totally going to say that when I saw the comment. I was like "why the hell is their dad on the floor?"

The correct term for an unloaded gun is, again, paperweight. We can debate the value of already having a round in the pipe versus the distinctive sound of chambering a round in a semi-auto, but a self-defense gun should have bullets in it. Household members should be trained appropriately; for instance the NRA program I discuss in comment 60, Eddie Eagle, seems to be appropriate for even very young children who cannot yet reach the top of the closet or whatever well-thought-out place the gun owning parent selects. As children grow older parents can choose to train them in how guns work and teach them the Four Rules promulgated by Jeff Cooper, showing the importance of practice and training. (Ammo quantity restrictions including high taxes are counterproductive when it comes to gun safety. Most rounds are used in practice; many of us may never fire a shot except at the range. Ironically, point-and-shoot is not a good approach to guns.)