Moments before a collision, the object arched up and dived down into the water.
But Hamilton was not about to give up the lead without a fight and he dived down the inside at Turn One.
"I dived down the inside and I had the corner, " said Vettel.
Mr Wilson had co-written with his wife Roberta a book on coral reefs, and dived down to explore them whenever he had the chance.
Page turning was slow and was accompanied by a distracting flash of black as the microspheres dived down into their oil-filled nodules before forming new text.
The Terriers went even closer to a leveller when Gunners keeper Manuel Almunia, previously a virtual spectator on his return to the Arsenal side after four months out injured, dived down low to turn Lee's header around the post.
But Ulster refused to lie down and Bowe dived over for his second try of the game, Wallace landing his third conversion.
Warrington were certainly not daunted by their high-flying visitors and went in at the break in the lead, as Fa'afili dived over to catch and touch down Lee Briers' kick into right-hand corner.
Derby were given a chance to double the lead when Nelsen brought down Miller, but Friedel dived to his right to keep out Howard's resultant penalty.
Hulse should have sealed victory from the penalty spot after Chris Hussey was adjudged to have brought down Lee Croft but Konstantopoulos dived low to his left and made an excellent save.
As Arsenal continued to carve open the Porto defence, Helton twice came to his side's rescue as he saved low down from Bendtner, then dived at his post to push out Abou Diaby's header.
Fussell was hauled down inches short, but Gareth Maule was in close support and dived over for the second try.
Kevin Pietersen crashed boundaries off his first two balls but hit an Albie Morkel full toss down to Roelof van der Merwe at mid-on, and the fielder dived to his left to take a stunning catch.
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