Northwest's little incident. This happened on Jan 19th (Sunday). Two mechanics were taxiing the A320 from remote parking into a gate at New York's LGA airport. They were held out on the taxiway for a bit. When finally cleared, the mechanic, being irritated, pulled a bit to much power. Coming into the gate he now finds he has no brakes. The Left engine was put into reverse, but it was too late. He hit the towbar, then the tractor. They hit the tractor so hard the nose gear collapsed. This is after he wiped out the jetway. The left side by the cockpit has been ripped open by the jetway. The jetway is now laying on top of the left wing and left engine. The left wingtip is also wiped out. After losing control the left wingtip rammed into the side of a Boeing 757 sitting at the next gate, ripping a hole in the right side. Remarkably no one was hurt, though a few were badly shaken.