Okay, hail mary with my ramblings thus far...

Lidocaine = Sample in a Jar
Mr Rogers = Cavern (ie take care of your shoes)
Nelson Muntz = Ha Ha Ha

some date crosschecking, all 3 of those songs were only played once, 6/22/95. And I can't map anything with those songs preceding, or following, anything of note.

And then the trail goes cold. And put my head back in the vice clamp.

Having said all that, my gut says they all sound like the beginning of the outro to The Coil.