I went through it, and understand to get the top led light to flash red, then as the light climbs up i guess you could say, its a diff. fireing rate. they all seem to be a semi-auto mode. BUT!! i am not puting air into it while testing, cause im in my house, lol, only turning off the eye, and listening to the clicking. The only time it isnt in semi-auto, is when i think im in demo mode(being all lights are lite on the handle). Does anyone know if its cause i dont have air in it?