Jack Bracelin's (Fiveacres Lights) created some of the light shows with equipment which ranged from 16mm projection of what we would now call 'art house' films (often projected sideways or projected into smoke) or 5 kW 'Pani's' (effects projectors) borrowed from Samuelsons at Pinewood or Elstree film studios (or Strand Electric at Vauxhall) to overhead projectors with transparent trays borrowed from refrigerators and filled with water/indian ink/beer/whatever. A favourite was to use 'Aldis' slide projectors with dual layer 2×2 glass specimen slides with basic designs created with wax crayons (drawn by Lou – the oft naked lady) and then various substances introduced with syringes – Indian inks, snot, semen – in fact anything of imiscible viscosities. Bubbles made by injecting air between the glass plates which were then squeezed (by a pair of long nose pliers – in time to the music) would send folks even further off their heads!