Sponge fingers for broken glass I'll wager.
I mean, I'm just shooting from the hip and interpreting glued eel's post like a normal person, but I'll bet he substituted sponge fingers for broken glass.
( mike woz ere 7442200 & 7696970 getter, Sun 12 Jun 2011, 23:41, archived)

I see
it all makes sense now
( Glovington, Sun 12 Jun 2011, 23:45, archived)