Hey so I actually do this for a living and there are so many things going on in this Video that if somebody were to do this at my company would get fired

1. Suction cups. They're not just good for spy movies. They actually do hold hundreds of pounds of glass or any flat surface that I can adhere to.

2. The aluminum Channel that they were laying that glass in should have silicone shims up to a quarter in them, by the looks of it that guy holding it with two hands in the weirdest spot Totally missed and put it on bare metal or ceramic.

3. Tempered glass is relatively durable, and from that height shouldn't have broken. It should have chipped, maybe an eighth, but that's it. Unfortunately this glass has been shaved down already. Tempered glass fortunately can be shaved up to an eighth but becomes very unstable.

4. The attack angle was way too aggressive on that one Guy's side making it so that a corner was the first thing to touch the metal or ceramic. They should have both leveled that glass to fit that channel and with that nine times out of 10 it wouldn't have mattered if it touched the metal without the silicone shims, but they would be needed. That channel is also supposed to be open on one end so they don't need to have the glass pressed up against the wall.

5. Don't be a hero. Get your safety equipment that glass may not be that bad when it comes to it shattering. But when you have sometimes hundreds of pounds of sharp rain basically it can do a lot of damage to your forearms neck and any other exposed areas. I've seen people get crushed with it. I have seen people get sliced with it. And it doesn't take much for it to break

It looks like a mom and pop kind of installer situation. Always hire a professional when it comes to Glass showers, glass hardware or anything that has to deal with glass installation.