I found that some Easter eggs weren't archived by EAC due to the fact they subly broke the CD spec. An example would be the first song of some versions of White Ladder by David Gray have a song "before" the first song. You press play then press "rewind" and the timer goes to -0:01 ... -3:45 or whatever and a song plays before the regular song at 0:00. I was tricky to hear it with a CD player because the rewind behavior was kind of undefined.

https://eeggs.com/items/8745.html