Watch: The Milk Crate Challenge Doctors Are Warning About

TikTok and other social media sites have been flooded in recent days by videos of people in the United States and beyond trying -- and mostly failing -- the climb the crates.

Health experts warned Wednesday that people should not attempt the latest viral challenge -- walking over a pyramid of precariously balanced milk crates. Heals and hospital bills wait ???????? #milkcratechallengepic.twitter.com/iGbcibE258 TikTok and other social media sites have been flooded in recent days by videos of people in the United States and beyond trying -- and mostly failing -- the climb the crates. Most videos end with what looks like a painful fall onto the collapsing crates, or the ground, as onlookers film on their phones in what some dubbed an event in the "Hood Olympics."