I got my 1st ATV ever, an '07 foreman 500 stuck in about 18 inches of snow today up in the mountains. I put it in reverse and got a little traction, then I put it in first and could feel it start to go foward. The engine was revving pretty high in first, but I was barely moving so I didn't wan't to change gears in fear of stopping again. I heard a few knocks from the fuel tank area and let off the throttle, and before I completly stopped again I gave it some throttle and heard the knocks again. (About 5 in a row) This got me out of the snow. So I headed home (about 15 miles) and heard no unsual noises and the knocks never happened again. Did I do any damage to my ATV by revving so high in 1st gear? The knocks have not come back and it sounds normal but I do not want any problems down the road. How should I have gotten out of the snow properly? Thanks for any help