A chat with Jeff Hedges establishes this event was at Fresno Arc California
An online search turns up a Thrasher article on a different event
could not resist also presenting this following article. This issue of Thrasher from the era of Animal Chin is MEGA!
http://www.thrashermagazine.com/articles/magazine/april-1986/
the picture in this poster may have been the hot summer event
recalled by 98 in the Shade though it adversities a different event
Just interested to find out about other 2DAC video productions.