Rule 1: Never do Level 2 of the 30-Day Shred while wearing loads of black crap on your eyes. The sweat and huffing and puffing* will make it run all over the place, and you will look like a much curvier, sweatier version of Jared Leto.
See what I mean?
Now, if you'll excuse me, I need to go paint my fingernails black.
* Not crying. Jillian can't make me cry.**
** Not a threat, Jillian. Please don't make me cry.*
*** See what I did there? It's like... like... a mobius strip, man. Like, meta and recursive and stuff. Like, WHOA.