Ha! That, and....have you ever seen the Pixar movie "Up"?
Russell: [off screen in the jungle] Mr. Fredricksen? Am I supposed to dig the hole before or after?
Carl Fredricksen: Nyaa! None of my concern!
Russell: [after a pause] Oh... It's before!
Carl Fredricksen: Nyaa! [covers his...
That would be a really odd time limit for a side quest. I can picture the failure message: "You did not reach the bathroom in time and wet yourself. Retry yes/no?"
If I'm thinking realistically - in a lot of the game he'd probably be camping, such as in Hyrule field. Hopefully he knows...