The comedy cameo is an artform in itself.

They are one-off moments of hilarity, often where you least expect it.

This is, in many ways, the ideal cameo formula.

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Step forward, Chuck Norris.

Who knew basketball players could do comedy?

He doesnt quite manage it, although scenes like this are comedy gold.

Whats your vector, Victor?

David Hasselhoff The Spongebob Squarepants Movie

Comedy cameos dont get much stranger than this.

Spongebob and Patrick need to get back to Bikini Bottom but have no way to get there.

What to do, what to do?

No matter, for whos that in the distance?

Thats right, its David Hasselhoff.

Fair play to Hasselhoff, never one to shy away from being able to laugh at himself.

Its one of the oddest movie moments youre likely to see, and a brilliantly realised cameo.

Tom Cruise Austin Powers In Goldmember

Never let it be said that Tom Cruise isnt a versatile actor.

Nor that the man cant have a little fun once in a while.

The reason his cameo in the thirdAustin Powersmovie works so well is that its completely unexpected.

Evil and a brilliant Danny DeVito as Mini Me showing the finger just is funny.

But its still the big name draw of Cruise that makes his appearance stand out above all.

The following clip isnt for those of a nervous disposition.

For the rest of us, lap it up.

Talk about throwing yourself into a role.

Martin Sheen Hot Shots: Part Deux

Hot Shots: Part Deuxisnt the funniest film youll ever see.

Heck, we doubt it would make it in your top 20.

It does, however, feature one of the funniest cameos ever.

I loved you inWall Street.

Paying homage to the great inspiration himself, Milligan appears briefly following the shoe misinterpretation scene.

Then, some subtle twitching of the fingers later, he ambles off, stage right.

Hot Tub Time Machine arrives in the UK on May 7th.