article_snippet.sent: Scroll down for videos .
article_snippet.sent: A hilarious new video has already been watching more than 3.7million times on Facebook in just a day.
article_snippet.sent: One user commented: 'Now this one is funny.'
article_snippet.sent: Whilst many others put a series of laughing face emojis.
article_snippet.sent: Like several people are really sticking your lips in small cups,' another ranted. '
article_snippet.sent: Do people not realise people're bursting blood vessels?'
article_snippet.sent: Last month, two Icelandic sisters attempted the trick by sucking into a hairspray lid, and warned others against the trick after the stunt went disastrously wrong.
article_snippet.sent: Writing on Facebook, Yrja As said: 'I wanted to warn people against do-it-yourself lip expansion, but was really surprised and shocked that it ended up being something that loads of people were copying. '
highlights_snippet.sent: Now a hilarious video shows how you can get the look a safer way .
  