A second later, the guests feel and hear the ghosts flying through the hallway. An extension is where the ghost disappears, then the guests hear and feel them moving back down the hallway. The air ram is triggered by a momentary foot switch connected to a washing machine valve. The footswitch also triggers a cassette tape recorder and a 555 timer. When the 555 timer counts down, it triggers a relay connected to a light that illuminates the pepper's ghost.
Guests enter a long hallway.
A second or two after that, the screams move down the hallway following the ghost pulses as if the ghosts are flying through the hallway. The guests feel the wind from the air cannon, and hear the ghosts pass by. The show could be extended to include another air cannon at the end of the hallway. Spider webbing, cheescloth, shredded cloth, etc. could be used to give visual effect to the air movement. Add fog to the air cannon and use a blacklight to ehnance the puff.