The Austrian attacker spurned a glorious chance to give the Villains an early lead, missing the target from six yards after Jussi Jaaskelainen had spilled a Christian Benteke effort.
Fortunately for the 21-year-old his wayward strike was not decisive, with the relegation threatened Midlanders securing a vital 2-1 win.
Lambert feels that Weimann will get over his mishap and will improve as a player because of it:
“I thought we should have had a goal in the first minute when Andi missed a chance and everyone was a bit hurt by that.” He is quoted by Sky Sports.
“It probably took Andi by surprise himself that he’s missed it. He is one of the most natural finishers at the football club
“Heads could have gone down after the early miss but Andi Weimann has been brilliant for us this season.
“He has pulled us out of a few holes a few times and he will come back stronger than ever from that. He’s only a young lad, people forget that. It’s important he bounces back from it.
“One thing Andi doesn’t lack is confidence, that’s for sure. His effort and enthusiasm will stand him in good stead throughout his career.”
Weimann was hauled off by Lambert and replaced by Simon Dawkins after 64 minutes.
Villa then went on to net twice through a penalty from Benteke and a Charles N’Zogbia free-kick.
Weimann has been impressive so far this season, netting four goals, including an effort against Liverpool at Anfield, in 18 league appearances.
He also helped the club reach the Capital One Cup semi-final, where they were knocked out by Bradford.