Title text:
Turning in other directions can be accomplished by using a magnetized centerboard and ocean currents, since a current flowing through a magnetic field induces a Laplace force.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3090/
As has been pointed out though on non-web clients it's much more disruptive to link to the webpage instead of how the bot works now. I'm not sure what the split is between web and mobile users but I'd hazard a guess there's appreciably more mobile client users.
I'm also not sure why it would require more loads on web, if you open a post (as you have to do regardless) does it not show the image with text below it anyways?