These bridges are made from natural light that I pumped in from the surface. If you rub your cheek on one, it would be like standing outside with the sun shining on your face. It would also set your hair on fire, so don't actually do it. Excellent! You're a predator, and these tests are your prey. Speaking of which, I was researching sharks for an upcoming test. Do you know who else murders people who are only trying to help them? Did you guess sharks? Because that's wrong. The correct answer is nobody. Nobody but you is that pointlessly cruel.