I witnessed a near accident today while one of your aircraft was on approach to HXD. The weather was reported at 200 overcast at the time the pilot began the approach. I was holding at the end of the runway when I look up and see the plane in a 1 mile final below 200 feet and 90 degrees to the final approach course heading away from the airport. I watched him circle at an altitude of less than 200 feet trying to come back around to the final, he overshot and just got it straightened out as he was crossing the threshold. The mda for this approach is 540 feet but the ceiling was 200, i took off immediately after he landed so I can say for sure that the atis was correct. My first question is how did he end up 90 degrees to the final on a straight in approach 1 mile from the runway? Second question is how do you go about reporting an incident like this? That pilot doesn't need to be flying, he will kill some people one day doing stuff like that.