In the episode where everyone's going to a party; George (with big coat) & Kramer are at the liquor store and Jerry & Elaine are at the bakery to get the chocolate Babka. Well, I'm sure everyone has seen this, but I was surprised to find it wasn't posted.

Keep an eye on Jerry's "racially harmonious" black & white cookie. It totally flips out! From shot to shot, the amount of bites taken out changes every time, as well as which side the black is on, and which the white is! Maybe this "demon cookie" was what caused Jerry to lose his "non-vomiting streak".