So, did anyone other than me think that JLD'd laughter upon seeing the hair was _too_ over the top to be acted? If you watch the tape, you'll see that she damn near fell on the floor. Also, Jason Alexander (whose character had seen the cut) was sitting still and quietly, until she lost it, at which time he had a case of the smirks.
I think perhaps JLD had not seen what they did to Jerry until that take.
Agreement? Disagreement?