Michael Clark was at his home when Officer Nicholas Hanning called on May 30
Clark had had run-ins with his neighbor and opened the door armed with an ornamental Hawaiian sword - which he dropped when the officer asked
Hanning then used his taser on Clark, causing him to fall and knock himself out
Hanning arrested him, kneeling on his neck in the process
The Idaho Springs officer has been charged with third-degree assault and fired
Clark is suing Hanning, another officer with him, their supervisor and the city