UK Coastguards were called out to reports of a teenager threatening to jump in the rough sea after playing the "neknomination" drinking game.
The RNLI Lifeboat based in Redcar in North East England was also sent to Saltburn Pier after being alerted by police, but the teenager was later found to be at home.
After going to the pier, Redcar Coastguard Rescue Team found the male had posted his intention to jump from it on social media after taking part in the online game.
Neknominate is a social media craze thought to have originated in Australia where young people are "nominated" to down strong drinks and carry out dares. Participants often share their exploits online after filming them on mobile phones.
Earlier this week the death of a teenager from Carlow was linked to the game.
Jonny Byrne, 19, drowned after he jumped in a river while taking part in a stunt.
Humber Coastguard watch manager Bev Allen said: "The craze of neknominate is spreading virally through Facebook but before accepting your mission please just stop and think about what you are doing.
"If you have been drinking, your judgement will be impaired and you will be more likely to be overcome by the cold, dark sea. Your acceptance of the dare is highly likely to be life threatening.
"Alcohol is a contributory factor in a significant number of coastal drownings every year. Alcohol and sea water really don't mix."