11 March 2021, 10:00 pm EST By TikTok has debuted another crazy challenge among its massive list of trending videos on social media, but this particular one has safety concerns from the audience and the community as it lifts a person and "cracks the back." While the activity is not exactly "cracking" a person's back, it features a therapeutic relief of releasing air off the stiff joints. (Photo : TikTok) TikTok's "Back Crack Challenge" has been catching up to the trends, as it brings people to their knees and asks the audience to try it and complete the challenge. The users and influencers that have participated in the act attest to the "therapeutic" benefits of the activity, as it pops off the joints in the back, bringing the "cracking" sensation like the ones in the knuckles.