Kramer drops popcorn, chips, napkins, a cardboard tray and several other items before he rushes into the bathroom. When comes out, implied to only be about a minute later, the floor is clean except for the popcorn.
Jerry states that Katya, the Romanian gymnast, won a silver medal at the 1984 Olympics. Only two female Romanian gymnasts won silver medals at that Olympics. One was Ecaterina Szabo who place second in the individual all-around, the other was Doina Staiculescu who took silver in the individual all-around in rhythmic gymnastics.
Both of the Romanian characters - Katya and Misha - have Russian names. Romanian is a Romance language; and Russian was never taught in Romanian schools even before 1989. Hence the likelihood of this occurring in real life is virtually nil.