At the end, when the ambulance is leaving with Sgt. Yee, a soldier closes the rear door, the ambulance begins to move, and the soldier raps on the rear door. The rapping was a signal for the driver to take off, but the ambulance moved before the driver got the signal.
'80s era Mudhen's pennant hanging in Klinger's room.
While dismissing television as a passing fad, Winchester describes turning a set on and being "confronted with a smiling, singing seltzer pill named Speedy". The "Speedy Alka-Seltzer" character wasn't introduced to television until March 1953, by which time Winchester would presumably have long since been stationed at the 4077th.
Boom mic visible when nurse Kellye says "You can talk..." to Sidney Freedman in post-op. DVD time 14:40.
When Klinger hands the package containing the discharge papers to the soldier going back to ICOR the envelope is just tucked in not sealed as it should be to secure such important papers. Later when Potter is signing a real 3 day pass for Klinger he uses a pencil when it should be signed in ink because a pass is an official document.
Major Winchester makes the statement that Persian rugs are not used as walls. They have been, however, traditionally used as wall-hangings, especially before the advent of central heating. Rugs make excellent insulators for drafty buildings, and due to their cost, were used as such exclusively by the wealthy.