@Buff - The exam death toll shouldn't really matter. The mere possibility of someone getting hurt or squashed should move these wannabe heroes to help them. Heck, even normal people are somewhat expected to do that by law in certain countries. The hilarious thing is they just watched the broken Izuku like a strange animal. That scene was really weird, even if they knew that a nurse would show up to heal him (which they didn't, at least not all of them).

By the way, glasses guy did see nice girl trapped because he commented that Izuku got hurt saving her. He might have seen her a bit late, but he still didn't do anything when he did. He even made an excuse, and in the process realized the highest scoring potential in the test is saving those in need. I mean... they're heroes. What did any of these kids really expect..?