I have Krietler rollers with the Killer Head Wind resistance / cooooooling unit. Love them both. No, you can not just zone out on rollers. That is why they are so much fun! I have owned them since 1992 and come off of the while "rolling" less than 10 times, and never "hit the floor" as some one said. Use them in a door way or close to a wall for balance and getting started.