A former plasterer threw one punch and knocked a man unconscious outside a Blackpool bar.
Kieron Curran also jumped onto a taxi and damaged its windscreen in a separate incident.
Curran, 26, of Sandicroft Road, North Shore, pleaded guilty to assault and causing damage.
He was bailed for pre-sentence reports and will be sentenced at a later date by Blackpool magistrates.
Alison Quanbrough, prosecuting, said police were called to an incident outside the Tapas Bar on September 30 where a man had been knocked unconscious and was being treated by paramedics. An officer checked CCTV and Curran was seen punching the victim.
Then,on December 22. a taxi driver sitting in his cab on Queen Street saw Curran trying to pick fights with people in the street. Curran then jumped onto the taxi damaging the windscreen, before sliding off. He now accepted he had not dealt with the situation properly.