Labuschagne, who had demonstrated a degree of application beyond England's batsmen so far this match, ignored the old rule of "never run on a misfield" when Joe Denly fumbled at third man and then failed to beat his throw to Bairstow.
Smith has been their nemesis in this series, his twin hundreds at Edgbaston setting up Australia's victory in the opening Test and courageous effort of 92 on day four here keeping his team in the game.
Labuschagne, worldwide cricket's first concussion substitute, battled on to register a half-century that helped guide Australia to safety after they had wobbled early on in their second innings.
"The heart of Test cricket is the kind of surface that you play on".
"They will be huge shoes to fill". He even urged his players to use the opportunity to level the series in his absence as he was the one behind Australia's 251-run win in the first Test. Smith scored twin tons there.
'They've got some good bowlers as well so we've got to bat well tomorrow'. I think guys prepared for it but it's another thing facing it. Guys have got plans in place and we've prepared really well for it - it's now about going out and executing it, ' said Paine. "It's now about going out and executing", Paine added. He'll still bowl fast, 90mph (145km/h), but do you want to lose the express pace? It's great for Test cricket, the interest it's sparked in the last.
"It was a great moment obviously to walk out on to Lord's (to) a packed house on day five and there was a lot to play for, so it was very exciting to be able to play a part", Labuschagne told 9News. "We're looking forward to the challenge again this week".
Coming out on 54-6 after the morning session, England lost Chris Woakes (5), who was strangled down the leg side off Pat Cummins, to the first ball after lunch and then Jos Buttler (5) to the first ball of the second over when he chipped a drive off Josh Hazlewood to short cover.
"It's fantastic to see a young cricketer with so much talent come onto the scene and it was a bit of a buzz to face him at Lord's", Paine wrote in a column for the Australian newspaper.
"With Jofra because he has such an upright seam it swings late after it has passed the batsman - and at his pace that means you have to be ready to go quickly".
Steve Smith has a tendency to leave the ball by removing his bat from the route-map of the ball and that became an instant hit among the fans. I just think it's global cricket, it's tough, ' added Paine.
But Archer deployed his fearsome short-ball sparingly during a superb return of six for 45 in 17.1 overs as Australia, 1-0 up in the five-match series, were dismissed for just 179 after England captain Joe Root won the toss in overcast conditions on his Yorkshire home ground.
They have stuck by Jason Roy, their World Cup-winning opener who hasn't found his feet in red ball cricket yet.
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