"Black Panther" has been in theaters for two full weeks.

The Marvel movie has been a smash success.

The M'Baku challenge is picking up internet steam.

The challenge consists of fans reenacting M'Baku's speech on Challenge Day.

These fans are nailing it.

"Black Panther" fans are dominating the internet with a new meme.

Fans are sharing videos of themselves completing the M'Baku challenge. It consists of them reenacting the Jabari leader's speech on Challenge Day when he confronts T'Challa over his role as Black Panther and king of Wakanda.

Though the movie has only been in theaters for two weeks, the challengers have the speech memorized, and their impersonations are impressive.

They are hilariously spot-on.

Actor Winston Duke, who plays M'Baku, weighed in on the videos.

"The #Mbakuchallenge is killing me!! Keep them coming-O!!!" he tweeted.

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