Concrete: A slightly tongue-in-cheek look

That's a big piece of sewer pipe. It's kind of weird that it's in sharper focus than is the rest of the frame, though.

The Engineer Guy makes some concrete - apparently from quickcrete - and then waits for it to set while his sample cures.

At 1:45 he says that concrete doesn't really dry and explains what's really happening. Then, though, at 2:05 he says he's going to wait for the concrete to dry. Sheesh...