The video shows what happens when you shoot at the worst possible angle to the water. It's just like skipping rocks. The bullets will fly in every direction when you shoot from that angle. There are a very few, very limited times you can shoot at water. Shooting straight down into water from a high river bank with a high bank on the other side of the river too (I'm talking a small river maybe 30 yards wide or less) and you know there the area is all remote country too is pretty safe. I wouldn't use a high powered rifle to do it though. Shooting at a steep angle to a pond or whatever with a hill behind it and miles of wilderness behind the hill is also fairly safe. Again small caliber rounds (as in .22's) only. Even in those situations I don't like to do it but if you live in a place like the one I grew up in you'll know there are large tracts of land in places with no one there except on very rare occasions. It would take a shot with odds of 100 billion to 1 (or more) to actually hit someone in a place like that and a round shot at a steep angle into water isn't going to come out with enough force to clear the hill anyway. I don't want to encourage anyone to shoot into water though. It's a bad idea especially if you don't know every inch of the land behind the water and know that there won't be people in the area at all. Just so you know bullets ricochet off of dirt too if you shoot at the same angle that they were using in the video. That's why they always have the signs telling you to shoot all the way to the backstop at the gun ranges.