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Watch Gisele Bündchen Teach Jimmy Fallon How to Plank

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After Jimmy Fallon admired Gisele Bündchen’s beach yoga skills on The Tonight Show, the supermodel and Under Armour spokeswoman offered to show him how it’s done.

But Jimmy said he couldn’t hand a headstand (and Gisele’s outfit wasn’t right for such a difficult pose) so they opted for a plank instead.

Jimmy actually keeps up with her pretty well– he even does a leg lift and a push up before he collapses under the weight of his non-supermodel body. But watching him try not to look down her shirt is the best part.

MORE: Watch Gisele Bündchen Kick Butt in This New Under Armour Commercial

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Write to Charlotte Alter at charlotte.alter@time.com