WHY- Because there are many people around you, and there are many counselors and people in the office to protect you and what not. PLUS your not an easy target, because you'd just blend in.
WHY NOT- Because there are creepy boys mostly but girls too who are looking for dirty and disgusting things from some people, or anyone random, so be very cautious around everyone and anyone, even if they're so sweet, but they have a vibe to them, I' in highschool, grade 9, god only knows what's about to happen to me during highschool for me...:]
I think in our world, the communities created stronger bonds. The whole world went crazy with the presidents and other stuff, but each community came together to support the weak and help one another.
The blood levels should check for the acetylsalicylic acid because aspirin is a blood thinner. I know because I take only a baby aspirin for a condition I have and I still bleed easily.
Objects falling are moving quickly, and being able to react immediately is the most useful skill in this situation. Being agile or having good balance isn't helpful if the object has reached the ground before you moved.