Actor Chris O'Dowd and his lovely wife, presenter Dawn Porter, have decided to try and raise a little (actually quite a lottle) bit of money for Stand Up to Cancer - with a bit of help from their friend, who just happens to be scary witch-man and all-round freakypants Derren Brown.

There are five guns. Four are empty. One contains a high velocity, explosive-tipped lethal payload. Sorry, I mean paintball pellet. O'Dowd's job is to pick the gun containing the pellet. Brown's job is to help him. Porter's job is to get shot. If they're all successful, they'll raise £10,000 for Stand Up to Cancer. Understand? Nope, me neither.

Anyway, here are some shots of the team training for the big event.

Stand Up To Cancer C4, 730pm Friday 19 October

"Anyone know why we're surrounded by lightsabres? Nope, thought not."

"I know what you're thinking. "Did he fire one shot or none?" Well, to tell you the truth, in all this excitement I kind of lost track myself. But being as this is a paintball pistol, the least powerful handgun in the world, and would slightly dirty your blouse, you've got to ask yourself one question: Do I feel lucky? Well, do ya, punk? Sorry, I mean darling?"

"Tell me to pick my pants up off the floor again. I dare you, Dawn!"

Stand Up To Cancer C4, 730pm Friday 19 October

Donation details

PHONE (opens 15 October - 19 November 2012

Call 0300 123 4444

ONLINE (opens 5 October till December)

Channel4.com/su2c

TEXT (opens 8 October till December)

To give £5 or £10 text FIVE or TEN to 70404

+ 1 std rate message. UK residents 16+ only, please ask bill payer's permission. Closes 30.11.12 Go to channel4.com/terms for T's and C's. Send NOINFO after your donation amount if you do not want to be contacted by CRUK in the future.

100% of your donation goes to the SU2C campaign administered by Cancer Research UK.