When Molly brings Mike A sandwich as they are talking the cut side of the bread switches from side to top several times.
When Mike and Carl are in the diner discussing their respective qualifications as potential detectives, Carl asks Samuel which of the two he would prefer on the case should he be murdered, thrown in the freezer and found several days later "all bloated and covered with frost." If he is thrown in the freezer there would be no decomposition, thus, no bloating.