Behind Jimmy Fallon’s secret door was none other than New York Knicks superstar Carmelo Anthony. They took on the running man challenge.

Maybe it’s just me, but I can’t seem to be quick on these fads.

For example, I didn’t know Cam Newton was “dabbing” until about December. The NFL’s MVP was literally dabbing on every highlight reel for months before this oblivious guy (me) understood what was happening.

Now, the “running man” is happening.

What is it? I still have no idea.

In any event, Jimmy Fallon, host of NBC’s The Tonight Show, certainly knows what it is. What’s more is he has New York Knicks superstar Carmelo Anthony coming out of secret doors to help with the challenge.

Check it out for yourself in the video above.

H/T YouTube, The Tonight Show Starring Jimmy Fallon

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