Before Norm and Wally's big fight at the end, Norm's shirt sleeves are buttoned at the cuff. When the fight begins, his cuffs are unbuttoned. During and immediately after the fight, they are buttoned again.
When Wally leaves the company of Norm and Cliff, he shakes Cliff's hand and says, "Nice meeting you Cliff." Wally wouldn't know Cliff's name as there were no formal introductions or no mention of Cliff's name in the conversation.