Mine never has jerked just falls. I do notice that once the glitch happens my heli starts to sink shortly therafter. Before this started to happen I was discharging my packs to about 7.22v before I started to loose lift. Now I loose lift with 7.65v and sometimes more. This is from the most recent pack I flew tonight. The glitch happened 4 times during that pack. The first pack i flew today didn't glitch at all. I am really afraid to fly my bird any more until i figure out what is wrong. I can't have it falling out of the sky every 1.5 minutes. I am going to check for wire wear and make sure I am not gettin a short. Aside from that I think I will have to order a new 3-1 which sucks because it's pricey. Any other ideas on the sorce would be greatly appreciated by me and my wallet.