User blog comment:GraveEclipse567/Why hate Sonic 06 for glitches and not SADX?/@comment-1684055-20120518212226/@comment-1684055-20120519145954

Not nessessarly, a bad disk could be a disk with corrupted data on it or something caused by a deep scratch. I remember buying Marvel Nemesis Rise of the Imperfects one time on PS2, and because the past owner used bleach to clean it (i could tell) the load times were horrible and the enviorment was glitched when it loaded.