#1, it's a video. You don't know how much time he took in between takes. Each time there's a new glass. That takes time to replace. He can be resting then.

#2, In the previous videos he was able to make a hole easy. So he continued in the same spot. In the last one he wasn't getting the same result so he hit the glass in multiple places. Had the crowbar started to make a hole I'm sure he would've continued like the rest.

#7, if you look at the thickness of the last glass it was only 13mm. He was using the sledgehammer on the glass that was much thicker. The first few ones that weren't thick he used a hammer. So why start off with a sledge for 13mm?

#11, The guy puts his hand through to show he can reach in and unlock the door. Do you think most criminals are going to stand there while someone is standing with a gun and still stick their hand in. And besides these safety glasses are mostly used in businesses. To prevent people from breaking in at night.

#13, All it takes is more time, eh? Because that's what a criminal is thinking. If only I had an hour or two I could break in. The more time exposed the greater chance of getting caught. All the glass has to do is withstand the attacks until the police show up. More time is a criminals worst enemy.

Where do some of you get your reasoning?

#6 I agree with you. The timing just seems to perfect and the mans reaction doesn't seem too terrified that a shark is feet away from his buddy. And what does he do when he hears there's a shark? He dives under to get a look at it. With all the splashing the shark just swims by? #9 this was from a website about sharks...

Sharks do not attack humans for the sole purpose of hunger. In fact, sharks do not know what the feeling of hunger is, and in fact, can go for many months without eating. This is not to say that sharks do not attack with the intention of seeking prey. Many attacks on divers and surfers especially can be attained to searching for food. To a shark, a surfer on a surfboard slightly resembles that of a seal or sea lion, or a diver in a black wetsuit can look like other prey.

Sharks also attack humans because they have been provoked or agitated by the person. Many spear-fishers have been attacked by reef sharks because when they spear fish, the blood from the fish and it's vibrations can sometimes result in a feeding frenzy by many sharks. Bright colours can also be counted for attacks.

As many people have believed in the past, sharks do in fact can see colours, and do indeed have very good eyesight. Avoid wearing the colours of orange and yellow, as this can aggravate the shark, and possibly lead to attacks.

Sharks are in fact attracted by splashing and vibrations in the water, and it can sometimes be attributed to attacks. Most scientists have not been able to predict why and where sharks attacks.

It looks like mild steel from the orange, rusty colour on the outside. Could be 1018. I worked as a saw operator and worked with similar steel which could be up to 12 inches in diameter and 20 feet long. 1018 steel is very soft and will dent easily. I always used cutting fluid when I worked but I was using saw blades and not a cnc machine. However when I did use the cnc machines for aluminum cutting fluid was used. But that doesn't mean every machine needs it.