I first tried emulation back before I knew anything about how much data was actually stored in cartridges. I remember downloading Chrono Trigger and one of the earliest versions of ZSNES. The ROM was zipped, and I didn't even think it was the actual game. I though there was just no way this huge RPG could packed down to the size of a two-minute MP3. Even after starting it, I think I was in denial for like 10 minutes.