Eating a pint of ice cream. I can eat dairy without a problem. Milk, cheese, yogurt, and yes, even reasonable portions of ice cream. But if I try to eat a lot of ice cream, my gut ends up suffering. A decade ago even, I could polish off a pint of Cherry Garcia without batting an eyelash.
Doing a somersault on the floor.
Expectations of you.
Going to bed late
Snow.