The crackdown on speeders is only in its first week, but Lambton OPP have already caught one man with his pants down -- literally.

A 25-year-old Wallaceburg man is charged with careless driving after he was stopped for speeding Wednesday night and was found with his pants around his ankles, police said.

His vehicle was heading west on Petrolia Line in St. Clair Township, going 37 kilometres an hour over the limit.

Police said the man told them he was trying to pull his pants on because he was running late for work.