A ton of bricks = 2 pounds?

I was a chemical engineering major in college. So, we used alot of unit conversions like 1 calorie = 4.184 Joules or 1 mile = 5280 feet but, I don't remember the one about 1 ton of bricks = 2 pounds!!! How is it that something that barely weighs two pounds can feel like a ton of bricks as she constantly performs cartwheels and other tricks in my belly?? I love it though!! :)