Yesterday, for whatever reason, Justin Bieber decided to open up the Twitter app and challenge Tom Cruise to a fight. We will never know the series of thoughts that led to this decision, all we know is that Bieber came to the conclusion that he simply must engage in hand-to-hand mixed martial art combat with Cruise in the octagon.

Trendsetter that he is, he sparked a number of other high profile celebrity challenges. Conor McGregor, after offering to host the Bieber vs Cruise match, singled out Mark Wahlberg as a celebrity that he would like to be given the opportunity to smack the tar out of.

Brent Spiner (who you might know as Data from Star Trek: TNG or as the weird scientist guy from Independence Day) decided to make his bout in the octagon one with Angela Lansbury:

Only to have his challenge intercepted by Dick Van Dyke, who I just discovered is very much still alive:

But probably the most striking of these is the one that global treasure Sam Neill received, largely because it came from an actual UFC fighter:

He is, of course, joking to make a point (but he also believes that waterboarding is not a form of torture, so who knows). Neill received the challenge in the spirit in which it was given, suggesting that he might need to be somewhat highly-armed to go head-to-head with a professional mixed martial artist and special forces soldier:

The internet: a mistake? Who knows.