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http://www.thesun.co.uk/sol/homepage/news/campaigns/our_boys/3027153/RAF-navigator-points-Im-with-stupid-sign-at-pilot-of-1400mph-Tornado.htmlA TOP Gun joker holds up a prank message poking fun at his pilot in a 1,400mph Tornado GR4 warplane.
The RAF navigator showed the "I'm with stupid" sign - with an arrow pointing at his pal in the £13million jet.
The flyer - based at RAF Lossiemouth in Scotland - knew they would be pictured by spotters as they roared through a mountain valley in Snowdonia, North Wales.
The Ministry of Defence laughed off the prank last night.
A spokesman said: "All RAF aircrew are trained to be consummate professionals but, as with all jobs, there are light-hearted moments as well."