How to generate these silly html characters at various heights / positions? [duplicate]

Question

See images for reference.

I wonder how to create them? What are they called? And why on earth it is possible?

• https://twitter.com/konieczny

• https://stackoverflow.com/a/1732454/775359

• RegEx match open tags except XHTML self-contained tags

Answer 1

It's just plain text, with special unicode characters called combining characters:

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h͚͔͕͍̣̙̞̃ͯt̖̗͎̩̳̻̆͑̈͐̉̐̚t͔͈̠̙̦̱͌̌͛́ͅͅp̱̞̓ͩͅ:̮̜̹̜͔̼͍ͪ̍̓ͨ͊̍ͥ/̖̮̘̰͕̯͈̱̺̓̎ͮ͐̈́/̿̍̓̑͌̔‌​̭̥̙͓̱̤͙͙ḳ̺̬̭̗͌̔ͩ͊̔̚ͅn̳͉̪̰̿ͦ̆̆o̥͎̮̠͌͋w͇̬̫̗͈̰̯̎ͤ̈́̈́ͮ͐́y͔̗͎̖̲̜͖̟̽͊ͪ͒̆̈ͪ̚ŏ̥͚̦̰͚͂̀̐ͧ̂‌​̞ù̠̩͖͓̦̆ͥ͂ͯr̜̣̝̘̬̖̲̓͛̓ͤ͛͗m͇̞̹̻̣̼͔̐̈e̖̻̲̺̩̟̙̮͑ͫ̋̇m͇̘̜̼̊ͤ̑̂e̲͉̦͉͉̓̉ͦ͂̋.̪̮ͯ͊ͪ̍̇͑͋͊̚‌​͓̺c͉͎͚͚̳̙̘̱ͤ͊͗͒͗̀ǒ̭͕̼́̈́ͅm̠͓̜͒̉/̹̳͎̯̥̪̮͗͛m̖͓̫͓͉͉̙̹̀̾͐ͧͪ̽ͥͥě̤̜͈̽̋̽ͮ̓̏̂m̻͆̊̅̎͂͆ͣ̍̾‌​͇̖̮͇̖̘̱͙e͙͍̻͕̤̾ͩ̄ͮ̈ͮͅs̘̺͕̳͂͑͒͆͐/͈͚̪̮ͨ͊ͨͯ̈́ͩ͌̚z̞͖̬͇̅ͨ̋̊ͬͩ̏ä̟͕͇͇̹̹ͤ̂̈́̂̌̒̆l̹͓̬̮̰͊̑̌̾‌​g̘̘̟͇ͣ̍̿̊̆͑̑ͅo̯̺͉͖̭ͥ̃ͣ̊̐̽

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If you copy it in Notepad++, you will see the following: