Peter Dinklage learns it's not a good idea to expose Jennifer Lawrence's Mystique as a mutant in a new clip from “X-Men: Days of Future Past”, TheWrap said.

In the scene, Dinklage's character — Bolivar Trask, the creator of those pesky Sentinels that eventually take over the world — uses some kind of a device that detects mutantkind to out the blue shapeshifter.

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Unfortunately for the government men in the room with her, she seems to have learned a lot since joining forces with Magneto (Michael Fassbender) at the end “X-Men: First Class,” and is well on her way to becoming the merciless Mystique audiences were introduced to in Bryan Singer's “X-Men.”

“Days of Future Past” hits theaters on May 23.