Title text:
Imagine you could ride alongside a sound wave. It would probably be pretty cool, right? We're putting in a departmental budget request to buy a really fast plane so we can check it out.
Transcript:
Transcript will show once itβs been added to explainxkcd.com
Source: https://xkcd.com/3238/
π
Thought this was from the hover text for a second!
It's an awesome comment, it totally could have been the hover text.