Amid the shock over Britain's historic vote to leave the European Union, social media site Twitter has lit up with netizens' jokes and opinions on the decision that was revealed on Friday (June 24).

The most retweeted one on the so-called "Brexit" was posted by former American intelligence contractor Edward Snowden, who had a thoughtful take on it:

Others alluded to the plunging British pound:

One netizen observed how Britain's vote to leave the EU would spark more of such referendums across the bloc:

Some references from popular culture included one that found the lyrics of songstress Adele's hit "Hello", which was released last year, remarkably descriptive of current events:

A meme also made its rounds over Twitter, seemingly created by a fan of science-fiction shows like Star Wars and Star Trek.