Drumming-induced rage.

PORTLAND, Maine — A man who participated in the Occupy Maine protest in Portland has been sentenced to a year in prison for hitting another protester in the head with a hatchet.

Christopher Schisler was sentenced to 8 ½ years in prison, with all but one year suspended, after pleading guilty Wednesday to aggravated assault. A criminal mischief charge was dismissed.

Authorities say the dispute in Lincoln Park started when Alan Porter began banging a drum around 7 a.m. on Nov. 18 to wake up fellow campers. The 35-year-old Schisler broke the drum with a hatchet, Porter threw the drum at Schisler, who hit Porter with the blunt side of the hatchet. Schisler’s attorney says his client is remorseful.