But of all the substitute explanations available, why the one which cites a barely viewed video?
And the substitute blasted home the second goal from 16 yards after being set up by McCulloch.
BBC: SPORT | Football | Scottish Premier | Inverness CT 0-3 Rangers
Hamilton's James McCarthy showed some excellent skill to set up Gilhaney, but Hutton saved well from the substitute.
Eggert Jonsson pulled down Cadamarteri, but the substitute's spot kick was too close to Kello, who parried clear.
The substitute, drafted by California Democrat Zoe Lofgren, failed on a 196-229 vote.
Jamie Murphy got a sight of goal deep into injury-time but the substitute was frustrated by another Mocka save.
The substitute teacher who was in the classroom will not work for the city schools during the investigation, he said.
Healy replaced Warren Feeney and the substitute made an immediate impact with a low shot which had Mikkelsen at full-stretch.
The substitute then set up the winner, pulling the ball back for Welbeck, whose acrobatic effort capped a thrilling encounter.
It should have been a simple finish as Elliott Morris, the substitute goalkeeper, was nowhere, but somehow Hutchinson put it over.
During a break, the substitute pianist, a young African-American jazz musician named Herbie Hancock, was doodling with a tune he'd just written.
It was the substitute's first involvement as he stepped up to take the spot-kick, only to see a dismal effort blocked by Green.
Killie responded with a shot by Craig Bryson, who had earlier replaced the injured Frazer Wright, but Mark Howard comfortably held the substitute's effort.
The Fijian wing cut inside to feed McLaughlin and although Noon put in a brave last-gasp tackle, the substitute was just able to touch down.
The game also marked Henrik Larsson's comeback from injury, the striker receiving a standing ovation as he came off the substitute's bench with 25 minutes left.
The substitute took up the wide position previously occupied by Ninis but instead of staying wide Salpigidis made diagonal runs into the centre and caused havoc.
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McCourt finished the game with a flourish, the substitute picking the ball up wide on the left and beating three players before dinking it over Kello.
The substitute scored with almost his first touch with a sumptuous left foot first-time strike from a tight angle, after a great little ball from Zidan.
The game also marked Henrik Larsson's comeback from injury for Sweden, the striker receiving a standing ovation as he came off the substitute's bench with 25 minutes left.
But a rule change, announced on Friday, will allow one day of testing at a non-F1 circuit if the substitute driver has not raced in F1 for two seasons.
The substitute, beginning his second spell at the club, curled in a sweet strike from 18 yards less than a minute after coming on late in the first half.
It was Aberdeen's turn not to make the most of their chances when a fine Maguire cross found Richie Vernon at the back post, but the substitute volleyed over.
Immediately, Calderwood sent on Owens and within three minutes the substitute had pinged a perfect ball onto the head of Kyle and the Scotland cap bulleted a header into the net.
Robertson was called on to deny Rod Wallace and Seb Rozental but in reality the substitute owed his clean sheet more to the profligacy of the Chilean and his fellow team-mates.
Villa, now without Heskey and finding themselves pushed back, did break and create a good chance when Stewart Downing pulled the ball back for John Carew but the substitute's shot was abysmal.
Alex Ferguson brought on Michael Carrick for Dimitar Berbatov to shore up his midfield, and the substitute duly set up Wayne Rooney -- whose shot was pushed onto the woodwork by goalkeeper Carlo Cudicini.
The England Under-21 keeper was forced to make another fine save when he palmed over Sean Davis's strike with time running out, but the substitute's shot was the last chance of an entertaining match.
Delaney has not yet played for Villa under his new boss O'Neill, managing only to make the substitute's bench for the Barclays Premiership game with Newcastle last month before the injury curse struck again.
BBC: SPORT | Football | My Club | Aston Villa | Delaney sidelined by knee surgery
Immediately, Palace took off Victor Moses and brought on James Scowcroft but it was a gamble that went wrong as the substitute pulled a hamstring muscle within minutes of his arrival and was forced off.
Guiza came on to replace Torres, and the move proved an inspired one as the substitute made it 2-0 in the 72nd minute when he lobbed Akinfeev after being played through by a delightful Fabregas pass.
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