mine and my brothers did the same thing.. we just pushed it REALLY hard.. it feels like it'll break but it'll slide back.. mine made a cracking noise, but its just the plastic pieces on the side that are stuck.. needa oil them down or something because they get stuck.. once you have it open you'll find out what im talking about.. black plastic pieces dont slide back at the same time your sunroof does because of friction

we both have 94 integras