http://www.kjmagnetics.com/proddetail.a ... 52&cat=168
Imagine the trouble a person could get into with one of those.

Or worse yet, what would happen if one of those was attached to the bottom of a manhole cover.

Or the hospital bill that would be incurred.
Or how the hell you would even remove one, if you got stuck between two of them?
No, I do not need one of these, ever. But it looks like so much fun.
*sigh*