In this short film from the Wideboyz, Norwegian climber Mari Augusta Salvesen sets herself the challenge of flashing 'The Dirty Dozen' at Brimham and producing a top-quality joke at every route...

The Dirty Dozen is a ticklist from the YMC Yorkshire Gritstone Vol. 1 (2012) guide and includes some outrageously filthy offwidths. Aspirant tickers must be prepared to climb green and slippy severes, desperate widening fissures and 'hilarious hanging rifts.'

Follow Mari in this fun video attempting to tick the following climbs:

1. Inside Out (S) - S 4a
2. Crackaroo (S 4a) - S 4b
3. Top Dead Centre (HS 4a) - HS 4b
4. Constrictor Chimney (VS 4b) - VS 4c
5. Harry's Crack (VS 4c) - VS 4c
6. Closet Crack (VS 4c) - VS 4c
7. Central Crack (VS 5a) - VS 5a
8. Desperation Crack (HVS 5b) - HVS 5b
9. Bog Crack (E1 5b) - E1 5b
10. Roadside Crack (E1 5b) - E1 5b
11. Tube Break (E3 6a) - E3 6a
12. Gigglin' Crack (E6 6c) - E6 6c

Mari is already well versed in British crack climbing having had several trips over here and ticking savage testpieces such as Ray's Roof (E7 6c) (E7 6c) at Newstones and Baldstones.