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One more reason to stay alert in those silent Snowdonian hills... 
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Navigator's gag amuses plane-spotters as fighter jet races through Snowdonia
Last updated at 11:29 AM on 24th June 2010
A RAF navigator gave plane-spotters a chuckle as he held up a sign reading 'I'm with stupid' with an arrow pointing to the pilot.
The pair were on a training mission in a £13million Tornado GR4 aircraft, capable of reaching 1,400mph, when the navigator pulled the prank as they jetted through a valley in Wales.
Based at RAF Lossiemouth in the Scottish Highlands, the men were flying through Snowdonia, in northern Wales, at the time of the Top Gun stunt.
Knowing there would be spotters in the area, the amused navigator produced the homemade sign and sure enough, it was captured on camera.
The Ministry of Defence laughed off the light-hearted moment, saying the navigator was showing some personality.
A spokesman told The Sun: 'All RAF aircrew are trained to be consummate profesionals, but - as with all jobs - there are light-hearted moments as well.
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