This could only happen to me.. A fellow flyer had a small fan jet which had no gears but took off with a long bungee cord stretched out.. He flew and a short time after I took my little Sig Profile Ultimate out to the runway, not knowing that he had forgotten to remove the bungy cord.. I gave the Ultimate full throttle, hurrying down the runway, just about time for lift off the Ultimate slowed down and came flying backwards back toward me.. What I didn't know was that the bungee got hooked into my tail wheel sending it back to its starting position on the runway.. Quite a surprise to say the least.. We all had a good laugh