Shawn's trailer in this episode is not the same trailer used in earlier seasons.
When Feeny asks Rachel what Eric's favorite fish is, not only is Eric's answer intentionally stupid, but he also misspells the answer. He spells penguin like "pengwin."
In the episode, when Corey invites Topanga to his room to start the process of further strengthening their relationship, Corey buys silk pajamas, blankets, and sheets in efforts to arouse Topanga. When Topanga respectfully declines the invitation for intercourse, Corey becomes frustrated and falls onto the bed while he was still wearing the silk pajamas and the silk sheets were still attached and crashes into a tower of cans Shawn stacked earlier in the episode. You can see shortly afterwards actress Danielle Fischel (Topanga) is looking beyond the camera towards the studio audience and the crew trying not to break character. It's unclear if this was a scripted stunt by Corey Matthews, but some assume it is.