Wait a minute. If I'm escaping from a submarine at 50 meters, then I'll *definitely* need a flashlight to find air pockets for gradual decompression on the way up. Time to start shopping professional dive lights.

"Worst-Case Shopping", by Randall Munroe, licensed under Creative Commons Attribution-NonCommercial 2.5 License

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Wait a minute. If I'm escaping from a submarine at 50 meters, then I'll definitely need a flashlight to find air pockets for gradual decompression on the way up. Time to start shopping professional dive lights.