dont think so.. unless your agility level is really low such that you wont be able to do certain obstacles. anyway i really dont recommend trying the darts.. if there's still time left, just go around it. it also helps if you've a clock somewhere, so you can tell how many seconds. this is useful if you're going from corner to corner, and get stuck at the blades at 5sec left. really no point trying anymore and just wait for the next pillar.