Continuity mistake: The position of Don's baseball cap on the table changes two times. Initially, the cap is near the corner of the table with the visor and letter "P" roughly parallel to the front of his body. After he pours beer into his glass, the visor is angled more toward the corner of the table (even though the camera appears to pan around it). When Don brings Mike back to the table, the cap visor is pointed toward Don and is at a differently angle (more parallel to the front of his body again). (00:00:09 - 00:01:47)
Continuity mistake: After Don poured beer into his glass, the level of beer remaining in the pitcher was about one-fourth (near the lower part of the handle). Don's glass of beer was about half-full when he went to meet Mike. When Don and Mike got back to the table, the pitcher of beer was closer to half-full (near the center of the handle) and his glass of beer was down to about one-fourth. (00:00:12 - 00:01:12)
Continuity mistake: The amount of beer in the pitcher INCREASES after Don pours some into his glass. Before he poured, the pitcher was about one-third full. A front view of Don seconds later shows the pitcher about half-full. When Don gets up to leave, the level of beer in the pitcher is down to about one-fourth full (near the lower part of the handle). (00:02:09 - 00:03:39)
Continuity mistake: Don's baseball cap is in front of him with the letter "P" against the table and the cap propped up with the visor (tip on the table). The cap can be seen shaking slightly from the men at the meeting bumping the table, but the cap does not fall over. After a camera shift, the cap appears to be flat on the table (in a position like it would be worn). (00:07:35)