I learned that theoretical mathematicians are super cool and worldly, wear leather jackets, and are ultra suave with the ladies, who positively swoon when you over simplify complex theories for them (a phenomenon also on display in Rise of the Silver Surfer).
I also learned that an impact strong enough to completely level a small building- say, a toilet- isn't strong enough to break ribs or snap vertebra of people who are hit by the same impact at the same time.