As thousands of protesters took to the streets of Washington, D.C., and New York this past weekend to protest the deaths of Eric Garner and Michael Brown, Samuel L. Jackson posted a video to his public Facebook page of him singing a song that expresses solidarity with the protesters and encourages his fellow celebrities to join.

"All you celebrities out there who poured ice water on your head, I challenge you to do something else," Jackson said in his message, referencing the ice bucket challenge trend that swept the Internet earlier this year.

The lyrics to Jackson's song reference Garner's last words after being placed in a chokehold by police.