Kramer is supposed to go to Room 1397 but gets the number wrong and accidentally goes to Room 1937. He discovers the pig man and runs into the room where Jerry, Elaine, and George are. Somehow he discovers which room is the right one and makes it down six flights of stairs to get there in just a few seconds.
When visiting their friend's baby at the hospital, their friend tells them that the baby is sucking away at his wife's breasts implying that she is breastfeeding. But when you look at his wife, in the next shot, her shirt is not up & the baby is not in any position where the baby would be breastfeeding.