Explain SMBC — the wiki for Saturday Morning Breakfast Cereal

The Joke

The comic is titled (implicitly) "Science Facts for Future Intolerable Roommates." It presents a series of factoids framed as fascinating science, but each one has a dark or unsettling twist:

1. "If you could stack all the money owed by the U.S. government, the stack would become gravitationally unstable before it got five meters high" -- implying the national debt is so enormous that it would collapse under its own weight as physical currency.
2. "If you were traveling through space near the speed of light, you would observe everyone suffocating, then you would stop observing" -- a grim take on relativistic observation, ending with the observer's own death.
3. "If you could arrange all of your neurons axon to axon in a straight line, you would literally be dead" -- factually true but pointlessly morbid.

A parent gives the child this book, and the child says "Mom! I hate this book!" The mother replies, "You'll thank me when you're older."

The Humor

The humor operates on multiple levels. First, each "science fact" follows the format of a standard mind-blowing factoid (the kind shared on social media or in trivia books), but subverts the reader's expectations by ending with death, destruction, or existential dread. Second, the title "Science Facts for Future Intolerable Roommates" suggests the book exists specifically to create the kind of person who corners people at parties with unsettling trivia. The mother's insistence that the child will appreciate the book "when you're older" parodies parents who force educational material on reluctant children, but here the "education" is deliberately obnoxious.

Votey

The votey panel adds another fact in the same style: "If you could hold a black hole in your hand, you could extort trillions of dollars." This continues the pattern of taking a hypothetical physics scenario and arriving at an absurd, non-scientific conclusion -- in this case, weaponizing astrophysics for financial gain.