Nevermind guys, I
just figured this out.
It's called Zalgo text. It...makes...your text...really messed up.
http://www.eeemo.net/
Example:
T̲̩̲̱̫͕̣̍̋h̶̼̯̓̉̔͗ͅiͥ ̳̯͖͌ͤ̅͡s̛̲̖͍ͬͯͮ̅͑ ͚̫͆̀ͮ̐ͯͦ̀́͝į̸̨̩̗̙̚s̾ ̝͍͈͚͕̞ͭ̿̏͑ͤ̈ ̶͓̭̞̤̩̩̭̹ͬ͂̀̔̓̑̚͜aͥ͆ͥ ́̀͏̜͕̟͙̣̯ ̥̪̳̎͌͡p̸̟̜̗ͣͤ͛̆̈͊͛͋̑͘ ̠͚͎͙̣o̎ͣ͌̀ͣ̀͠҉̬͎̬̼̞̙̱ ̮̱ș̖̬̲̬̲̯̻ͣ̂ͦ͜͜ͅṯ̂͆ ͇̬̬ ̬͍̗̝̤͇̼̤̉̉̉͂͌͐͡i̊ͩ̈́͆̇ ̶̢̜̫̮̾͌ņ̸͉͉̮̭̙̐̊ͭ͌ͤ́ ̺ ͦ̓̊҉̘̜̞̲̙̻̺aͮ͑ͥ̇͑ͮ͌͊҉ ̱̗̞̦ ̶̵̨͉͇̹͖̹̀͆t̲̰̱̭ͬͫͧ͜hͪ ̸̱̗̪̱͆̆ͅr̶̶͙̝̯͓̤͈̘ͤ̉͟ ͚ͅẹ̣͑̑̈̂a̧̓ͭͥ͑ͪ̎ͦ̊́͘ ̫̩̞̯͓͔̱̭d̴̷̠̄̋̇̐ͭ̉͛̚͘ ̫ͅ ͓͕͖̿̑̾́͐ͣ͋̓̚͠o̓ͦ̓̋ͭ̅ͮ ̷̳ͥf̊ͪͥ̃ͨ̒̈́ͤ҉̡͉̘̫ ̞͇ ̘͕͈͙̯͈̲̪ͤ̀̔̿͗M̐̂҉̰͚͉̙ ͇̥a̻͇̗̭͓͐̾ͅͅc̶̨̘͙̽̾ͫͪ ̭I̶̓͊̿̽ͣ͛͏̥̩̩͓n̈̀͆͊̑̈́ ̷̸̘̖̳s͕̠͕ͥ̐͐ͯ͑ȋ̸͔̑ͫͅ ̬̹d̖̥̰͓̬͈̝̓̕͢e̖̗͍͛̕͢r ̶̷͚͕͍̹̞̱̣̑̑̄̏͜s͊̐̐̆͆̄ ̮͙͕̪̮̱̗̊͑͞.̶̱͈̤͆͛
By the way, don't bother Googling Zalgo'd text - you'll get an error.