In Kent, WA. At the Pacific Raceway. 25,000 people.
Imagine this, dragsters, funny cars, stock cars. Up to speeds of 330mph, under 5 secs in a 1/4 mile.
So much power. So loud. Earplugs helped, but you could feel the shockwave hit you as they gunned their engines.
They had to re-do their cars and engines after each race to get ready for the next. It was open to the public for you to see. After they were done rebuilding, they fired up the engine right in front of everyone. (there's some pics). I took some video clips, but I don't know how to show them on here.