I'm unstoppable, Incredible Hulk; you're trapped in my medicine ball

from Lil Wayne (Ft. Eminem) – Drop the World Lyrics 1 on Rap Genius

“Medicine Ball” is a track off Eminem’s Relapse album. In it, his medicine ball IS the world

Eminem wants to “entrap” you in his rigorous pilates workout routine, which helped get him THIS body:

When exercising with a medicine ball, be careful not to (ahem) drop it

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