Travelers were delayed Saturday night after a man was spotted “surfing” on top of a Worcester-bound train while wearing a sombrero and a poncho, Transit Police said.

The 28-year-old Worcester man, who allegedly appeared intoxicated, said he had been at a pub crawl in Boston with his friends that afternoon. The group allegedly boarded a commuter rail train to Worcester when the man was separated from his friends, Transit Police said.

A train engineer said he was contacted about 9:45 p.m. and told to stop the train because a man was riding on top of it. The train was traveling about 40 miles per hour between the Ashland and Southborough stations at that time, Transit Police said.