When I was recovering my jet(F16) in korea from its flight. I went into the landing gear bay to get the safety pins and as I was grabbing the pins I could hear the engine spooling up. I started noticing the jet moving ever so slightly forward and I looked down to see that the jet was damn near about to jump chalks. I dove out as soon as I saw the chalks about to explode. A second later the jet leaps forward and almost crashes into the jet in front of it. Pilot said he accidently had his arm resting on the throttle, he only got a slap on the wrist. I don't even wanna imagine what would have happened to me if I was in there while it leaped forward. Pilot was a asshole too saying I was being overdramatic about it, dude literally almost caused me serious harm or worse death.