set low grav on that springboard, so it looks like its real!
Trigger_push on the tip of the board compined with a point_clientcommand and a trigger_multiple
trigger_push name = board_push
point_clientcommand name = board_command
trigger_multiple output: 'OnStartTouch' | 'board_command' | 'enable' | no parameters | 0:00 delay
trigger_multiple output: 'OnStartTouch' | 'board_push' | 'command' | '+jump' | 0:10 delay (0.1 seconds)
trigger_multiple output: 'OnStartTouch' | 'board_command' | 'disable' | no parameters | 0:80 delay
And hey presto! a diving board