Yak-52 - two buttons on the throttle, intercom and TX. Standing on the wing, giving guidance to occupant of front seat on the gentle art of starting the tractor. Guidance hampered by having the mags turned off in the back. Turn on mags, front seat occupant's efforts now bear fruit. Lean into back cockpit, plug in headset, press intercom and use choice phrase including very, very, very bad word to describe oneself by way of explanation to front seat occupant regarding initial state of rear mag switch. Look up, to see groundcrew member 50 metres away fall to the ground, clutching an Icom, and apparently suffer some form of convulsion. Realise with a sinking feeling that button pressed was TX, not intercom, and have just used very, very, very bad (strength 5, readability 5, pronounciation and enunciation later confirmed as 100% by groundcrew) word over local A/G frequency.........2 of the classic Yak-52 rookie errors in one. What a
