These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Surprise Difficulty: Not just because running in a straight line has become trickier than juggling flaming chainsaws, but also because a hurdle appears inexplicably halfway down the track, plus you're not sprinting, you're doing a running jump. At 100 meters, you're expected to leap as far as possible into a sand pit.