this happened to my friend and he had to pull the plastic so there was a big gap inbetween the 2 rubber plates and then they pulled it out, no harm but you might want to get a repair because if your wii is broken and you did break it and there is a crack it they will make you pay, so is your wii under warranty?
you might need to call nintendo at 1-800-255-3700.
you might need to call nintendo for a repair.
in the mean time, I saw a video about this problem on youtube showing how to get a stuck disc to eject. try holding your wii with the disc slot pointing at the ground and press eject. it should let the disc come out.