tonight i was riding home and it had just finished raining and it was slick so i thought i should practice some skids, i did a couple little ones, then right before my driveway i tried one more and my chain just fell off i dont know why or how. any insight would be appreciated. anything i should look for.

A chain tensioner.

Was there any play in the tension prior to skidding?

It just was not tight enough or your chain line is wacked or both. Probably both. You may consider getting a track or bmx chainring too if your using road now. They have really tall teeth and no ramping grooves for shifting gears. I tighten my chain just to the point where I cannot physically remove it from the front chain ring with my hands.

i dont think that my chain was loose enough for it to come off. i looked at my chain line and it looked off so i put my chainring on the outside and that just made it worse, so to the back it went. I dont know how else to straighten out the chainline.

I was assuming it came off the chainring and not the cog. I am guessing here but if your frame is super flexy than maybe it flexed enough to loosen the chain to pop off. But it seems to me that the chain had to be loosened in order to come off. If the rear wheel slipped in your drop outs you would have noticed that. If your chain line is off a hair that is fine. In your case the only way to get it right is to get a new BB or at least a new BB spindle in a shorter length.

are you using proper axle nuts? if not, then order some track nuts with the integrated washer. you can get them pretty cheap at businesscycles.com or harriscyclery.com then, make sure you've properly tightened them. i usually tighten mine down to around 300 inch pounds. i rarely have a problem with losing chain tension. it seems like most of the folks i know that have lost chains when skidding or when the rear wheel is under heavy load was because their axle nuts were not tight enough.

i had a friend of mine look at it and they say that i was probably that my axle nuts were lossened and that i need to take some links out of my chain because it sits too far back in the track ends. thanks fot everyones suggestions, it has helped.

Been mentioned a thousand times before but it bears mentioning again. My personal foolproof technique for seating the wheel is to pull it back against the chain, put the box end of the wrench on and spin down so it's almost against the forkend, start pulling on the box of the wrench as you tighten down. Once it's just a little tight (fingertite[tm]), check your chain tension. If it's a little too tight, as it sometimes can be, a little tap with the wrench will move your axle forward in the ends. It should be good now, just the teensiest weensiest bit of play. Now wrench that F'er hard. My mtb's driveside locknut is actually mushroomed because I didn't wrench it tight enough the first time I went for a real ride and the wheel slide forward pretty seriously. I fixed that. Then you can tighten the NDS as usual. Only the driveside needs to be tight as a banker.