The only time Ive ever got too close to being struck by lightening, was way back in the 1980s, whilst decending the Cribyn to Fan Y Big ridge in the Beacons.
The humidity levels must have been off the scale, as i were perspiring heavily even when stationary, and i can remember being able to feel the electric static in the air.
You could hear the thunder rumbling all around, but thankfully the lightening was off in the direction of the Talybont direction, but the entire atmosphere was charged with electricity.
As i was in in such an exposed location, i only hoped that the passing storm was not centralised right on top of me.
Its very unfortunate for those unlucky enough to be struck by lightening, as most of the time its impossible to escape a thunderstorm directly overhead.