(DIR) xkcd - A Webcomic of Romance, Sarcasm, Math and Language.
 (DIR) Floodgap Gopher Fun and Games
        
       xkcd - A Webcomic - Hazard Symbol (2038)
        
       Image:
 (PNG) hazard_symbol.png
        
       The warning diamond on the Materials Safety Data Sheet for this
       stuff just has the "😰" emoji in all four fields.
        
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