Read the whole strip at: https://thetortoisewebcomic.net/comics/37

[Image description: Spock arrives to find professor Altort Einstoise flipped upside down. Spock asks “Professor, are you okay?” The professors says “I was moist with my own mustard…” Spock corrects them: “You mean ‘hoist with my own petard’”. “Is that how it goes?”, the professors asks. ]