xkcd

It's important to learn the moves that take you into the vortex, but it's best not to study vortex itself too closely. Even grandmasters who have built up a tolerance lose the ability to play for a few hours after studying it.

https://explainxkcd.com/3082/

FYI: As it's getting somewhat tedious to post new xkcd comics here manually (and get comments into my inbox), I am, after saving here, going to ask the operators of rss.ponder.cat to set up a bot to post these comics to a dedicated community. If that is set up, I will stop posting manually here. I suggest people then subscribe there.