I only got around to watching all the Bill and Ted movies last month, and found this explanation to make more sense: https://www.reddit.com/r/explainlikeimfive

I only got around to watching all the Bill and Ted movies last month, and found this explanation to make more sense: https://www.reddit.com/r/explainlikeimfive/comments/397ukr/eli5_in_bill_teds_excellent_adventure_when_bill/ https://www.reddit.com/r/explainlikeimfive/comments/397ukr/e... (tl;dr it's a reference to a watch ad.)