Watch Chris Evans Surprise Fans With A 'Captain America'-Themed Escape Room

It's all for a good cause.

Captain America star Chris Evans wants you to join him for an escape room adventure, and he even pranked a few unsuspecting fans to show you how fun it could be — all for a good cause.

Evans is teaming up with Omaze to give a fan and three friends the opportunity to hang out with him in a custom escape room. The contest is raising money for Christopher's Haven, which provides housing to Boston families with children who are fighting cancer in nearby hospitals. Evans, a Massachusetts native, has visited there several times.

Patrons at a comic book store in the Boston area were surprised when a Captain America doll started talking to them. Little did they know Evans himself was voicing the doll off camera. "This may look like a standard comic book store," he told them, "but it's actually a secret Hydra base, and I need your help to take it down."

Evans gave participants several challenges, from searching for a four-digit code hiding in plain sight, to asking around for a secret Hydra operative on the street. Their efforts eventually led them to the store's very dark basement, where Evans finally revealed himself.

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See how the fans reacted in the video below:

(H/T: E! Online)

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