it came from the trailer park!

i love this 16MM print of a very cheesy thriller starring george segal, rollercoaster [1977].  i was looking up the band sparks [really a pop duo compromised of the brothers mael who have been going strong for over 50 years] who, in this movie, perform onstage at the theme park as the psycho tries to blow up, you guessed it, a rollercoaster on a very busy day.  i love rollercoasters, i love disaster flicks, i dig sparks, so sue me.  also, the theatrical release of this flick was in sensurround.  what?  it was a gimmick to add to the viewing experience of the disasters occurring onscreen.  it was the soundtrack with an extra bass track added to the mix.  why do that?  because when the shit hit the fan that extra bass was felt.  the theater shakes. your bones & guts rattled.  a few disaster movies in the 1970s had that added effect; like the disaster movie, earthquake [1974].  i remember the first temblor of that movie.  i was with my family at the matinee. the whole theater rumbled hard.  it was scary as fuck.  i recall a girl sitting in the fourth or fifth row.  when that bass rumble started she leapt...bing...bang...boom...over the three or four rows of seats.  to the exit.  a brief slash of sunlight.  & she was gone.