Narrative:

I was flying fertilizer on a wheat field about 5 miles from my own personal airport. When I came back to my airport to land; I came in on final was just over the south end of the runway when I noticed vehicles and a helicopter right in the middle of my runway. I added power and went around; flew over the top of them by about 30 ft and circled while I called my people on the ground to drive down and have them move. After they moved I landed; taxied down to where they had moved to the north end of the runway and got out of my airplane to wait for them to finish loading their patient into the helicopter. As I was waiting an ambulance driver approached me; verbally assaulted me and said they were going to turn me into the FAA for reckless flying. The airport is owned and operated by me; they did not call to tell me they were coming; they just moved in and took over.

Google
 

Original NASA ASRS Text

Title: An AG-CAT pilot returned to his privately owned airport following a mission and executed a go around because a Life Flight helicoper and ambulance were on the runway loading a patient.

Narrative: I was flying fertilizer on a wheat field about 5 miles from my own personal airport. When I came back to my airport to land; I came in on final was just over the south end of the runway when I noticed vehicles and a helicopter right in the middle of my runway. I added power and went around; flew over the top of them by about 30 FT and circled while I called my people on the ground to drive down and have them move. After they moved I landed; taxied down to where they had moved to the north end of the runway and got out of my airplane to wait for them to finish loading their patient into the helicopter. As I was waiting an ambulance driver approached me; verbally assaulted me and said they were going to turn me into the FAA for reckless flying. The airport is owned and operated by me; they did not call to tell me they were coming; they just moved in and took over.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.