Title text:
They're up there with coral islands, lightning, and caterpillars turning into butterflies.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3135/
True!
Going further - "tides" actually rip planets & stars fully apart (binary star systems, around black holes, yo mamma casually strolling through a galaxy).