What started out Wednesday evening as a demonstration of support for the Egyptian revolution turned into the most contentious Occupy Portland protest in more than a month.

The Portland Police arrived in full force, in riot gear they came in cars, on horseback, bicycles and seemed to far outnumber the occupy Portland protesters.

This video shows police surrounding and impounding the "CrankMyChain Disco Trike," which is a human powered multimedia vehicle used by the PDX Bike Swarm to entertain, bolster and help pacify protesters. Owner and operator Dan Kaufman was handcuffed, cited for "unlawful operation of sound producing equipment," and released. The trike, its sound system and miscellaneous other equipment, remains in police custody until a court date of Feb. 13, 2012.

Four protesters were arrested in all, including one for assaulting a police officer after he was scratched and spat upon.