A dangerous new TikTok trend has police from Los Angeles to Florida sounding the alarm as they say the stunt is a fast-moving recipe for arrests, smashed doors and potentially deadly confrontations.

The so-called “door kick” or “door knock challenge,” a juiced-up version of old-school ding-dong ditch, dares teens to kick or violently pound on a stranger’s front door, then sprint away, all for social media clout.

Authorities say it’s spreading nationwide, and the consequences are escalating just as quickly.

In Florida, three teenagers were arrested in early December after allegedly kicking a homeowner’s door during the trend, triggering fresh warnings from police departments across the country.

In Southern California, the Manhattan Beach Police Department says it took a preemptive stance earlier this summer after a door-kicking incident that mirrored the now-viral trend.

According to police, someone ran up to a home in July, kicked the front door twice and fled, causing damage. While no arrests were made and the incident was not definitively linked to TikTok, the department later cited it in public warnings and social media alerts urging parents to talk to their children about the dangers, and the criminal consequences, of the behavior.

“That was the only case that we saw,” Manhattan Beach Police Sgt. Andy Abreu told Patch. “I can’t definitely say these are the TikTok challenge kids, but it was the M.O.”

Abreu said the department issued the warning anyway as the “door kick” challenge continued to spread nationwide, raising concerns that what some teens see as a prank could quickly turn into property damage, arrests — or worse.

“I don’t want some poor mom saying, ‘My kid was just playing a prank,’ and something bad happened to them,” he said.

Police departments in Atlanta, New Jersey and other cities have issued similar alerts, warning that startled homeowners may react out of fear — potentially turning a prank into a violent confrontation.

The South Fulton Police Department in Georgia labeled the challenge “dangerous,” warning it could escalate quickly if residents believe their home is under attack.