As an officer of a local cemetery association, I was concerned when an announcement was made in the newspaper to honor the grave of deceased man who was influential in getting the motorcycle helmet law repealed here is CT.
There were three groups of about 500 motorcycles each escorted by the State Police from a gathering area about 10 miles away to the cemetery. I was at the cemetery during one of these gatherings which were held on Memorial Day. With about 500 motorcycles arriving and about the same departing, the odor of unburned gasoline, engine exhaust and noise was overwhelming to the point that I decided to leave. Knowing the area, I positioned my vehicle so I could leave the area easily and not get into the traffic.
Watching this was actually awesome as they shut off their cycles all at the same time and in an orderly manner passed by the grave of the honoree. On signal from their leader, they started up their cycles and departed as the next group arrived from the other direction. In each group there were some cycles that wouldn't restart. After the ceremony, I returned to the cemetery and ended up bringing about 15 or so dead cycles and their owners back to the gathering area in many trips with my cargo trailer where they had maintenance support already staged there.
The 3,000 or so beer bottles that were left is another story, but I won't get into this!!!
I never have been around where there were 1,000 lawn mowers running at the same time however!!!!