This may be a simplistic answer, but I have used this in the past to great success. Basically, you create a seesaw. You will need 12' or 16' 2"x12" boards. Create a fulcrum in the middle with pipe on a stand using a simple triangle base. Use "U" clamps to secure the board to the pipe once you have worked out the placement of the fulcrum. Placement of the fulcrum will make it easier on your techs raising and lowering the actors. The actor sits on one side of the board (I usually create some type of seat with a seatbelt they can fasten or handholds they can hold on to) and techs push down and up on the other end. Focus a follow spot on the actors as they go up and down, add bubbles from the sides or above, and this should do it.
Bruce Taws
Mosley Drama
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