Laarparts again, early 80's, II ac Sqn Jags. Got dragged out of the crewroom to do brakes from hangar to HAS. Young and blasé, took my mug of coffee into the cockpit. Sheer-pin broke as we took the tight turn to the entrance to the pan. I hit the brakes....... nothing!! I hadn't checked the brake pressure before jumping in. The aircraft rolls gently onto the (thankfully firm) grass. I quickly throw the coffee mug into the bushes and give a quick burst of the Electro-Hydraulic Pump. "Yes Sarge.....got plently of pressure.... don't know what happened". Pushed the aircraft off the grass and into the HAS. No damage but not my proudest moment
