I realize this is a years-old thing, but I just stumbled upon it earlier this week at work and ended up watching the whole damned playlist in my downtime:
Videos from the first couple "series" are pretty terrible, but the production quality ramps way up (by the 7th one they've got 360 intro shots for all the bots).
I think these are incredible. I was on my high school's Mindstorms team way WAY back in the day (like 12 years ago) and this is the kind of crap I'd do that eventually got me kicked off the team. Fun fact, the Intertia robot from this series is pretty much a dead ringer for the bot I built that eventually got me the boot. :P
Twister is definitely my favorite from the series because I personally know how hard it is to build an angled spinner out of Mindstorms parts. So awesome. Whiplash is a great example of a well built vertical spinner, and Reaper is pretty much solid proof why a horizontal spinner doesn't work too well with Lego.