The Hot Number Affair - S3-E25
Trivia: There are a pair of meta-references to Sonny and Cher's guest appearances in this episode. One of the Harrys at Agnes Sue mentions the pair a few moments before Cher makes her first appearance, and when they appear on screen together for the first time, the song playing under the scene is their #1 hit "I Got You Babe".
Answer: He must have ridden in an Eaton's store elevator while he was in Canada at some point. For some reason, this elevator reminds him of it. The show's original concept had Solo being a Canadian, so this may be a minor nod to that fact.
raywest ★