Other games that my 360 has had troubles reading is Forza Motosport 2 (the first night I opened it, it wouldn't read it once, but then I ejected, then put it back in, and it worked), NBA 2k8 (just once), and my brothers had it happen to them with some MLB game they rented too. Now that I think about it, this has happened to all the games I've had, but it only happens in the beginning. Tonight with the Mass Effect problem was the first time this issue happened when it just said some instructions. Something like "1. Clean the disc, 2. (I forgot what number 2 said) then it said something about contacting XBox on the bottom of the screen."
I took the disc out (the disc was really hot, but I'm not surprised considering it's always been hot after someone played it for an hour, this happens to all my discs) and put it back in after about ten minutes, and it worked again.
My 360 is horizontal, and the air circulation around it is spacious. The same goes for the power box. The only thing that stands in the way of the fan 'outage?' is a couple of wires, but it's not like it's really close to the vent of the 360.
I'm a little worried about it, and I'd appreciate any type of advice. I'm very nervous and worried that I have to send it in and get it fixed again because my parents hate it when that happens, but I guess what has to be done should be done, but I still want to know if this is normal or if this sounds really bad or not. I appreciate any help. Thanks.