something isn't right...

Hello! Me, again. 😅 So, I worked with my gun for about an hour today. I wasn't going non-stop...there were lots of starts and stops as I am still figuring this thing out! Towards the end of my time using the gun it started to move REALLY fast--like, I was pressing the trigger as I had been the whole time but now the gun was speeding along at a pace that I could not properly work at. I'm not sure if a wire got messed up or something needs to be loosened or tightened? I tried pressing the trigger lightly and it was the same, it just zoomed along. I was shooting a short video of me using the gun when this started to happen so I have that if you need to see what I'm talking about..not sure how if I'd be able to attach it here, though. I was just getting on a roll with my gun so any help to fix this issue would be greatly appreciated! Thank you!!

Elizabeth