Criss Angel purposely tricks viewers. Off topic: it looks rather fake.
Laws of physics don't make exceptions just to trick our senses.
What does motive have to do with the fact that something doesn't always appear as is?
What about a straw in water? Or looking across a tarmac on a hot day?
I'm assuming you'll bring in some portion of, "well, we know how those occur." Well, logical conclusion would be that the variables aren't completely known for why the Earth appears curved. Again, seeing such a curvature only proves that it appears that way. If the Earth is flat, there must be something going on that we are missing.