A popular meme YouTuber ("Daily Dose of Internet" [0]) featured a clip of someone lighting their tap water on fire. Commenters explained that flammable water is common in places where fracking pollutants have contaminated the ground water.
Among the many examples:
https://www.youtube.com/watch?v=EfHcypKLxgc
https://www.youtube.com/watch?v=LP5fIKqobm0 (This is not an example of fracking pollution, according to child comment.)
I was stunned, to say the least.