Today host Allison Landon punches Karl Stefanovic in car crash interview

Today host Allison Landon punches Karl Stefanovic after he bursts into uncontrollable laughter during an interview with a hero tradie

He’s interviewed some of the worlds biggest celebrities during his 20-year career with Channel Nine.

But on Wednesday, Today host Karl Stefanovic, 45, was reduced to a giggling mess as he flirted with a hero tradie who took down a knife-wielding robber in Melbourne.

The bizarre exchange forced Karl’s co-host Allison Langdon, 41, to get the interview back on track, and at one point she playfully hit Karl on the arm to settle him down.

‘This has taken a turn!’ Today host Allison Landon punched Karl Stefanovic after he burst into uncontrollable laughter during an interview with a hero tradie on Wednesday

After praising Sam Dale, 22, for his heroic actions which saw him thwart a would-be ATM heist, Karl made the interview a little bit personal.

‘I was going to say do you have a girlfriend or a boyfriend or whatever. Do you have a partner?’ he asked.

Sam burst into laughter before admitting he was single.

Taking a turn: After praising Sam Dale (pictured) for his heroic actions which saw him thwart a would-be ATM heist, Karl asked him if he had a 'girlfriend or boyfriend'

Taking a turn: After praising Sam Dale (pictured) for his heroic actions which saw him thwart a would-be ATM heist, Karl asked him if he had a ‘girlfriend or boyfriend’

‘No, I don’t actually. What are you trying to say, Karl? Are you keen?’ he joked back.

‘I just had a newborn, I’m trying to keep my options open…’ Karl responded as he bursts into fits of laughter.

Ever the professional, Allison intervened to get the segment back on track.

'I just had a newborn, I'm trying to keep my options open...' Karl responded then bursts into uncontrollable laughter after Sam asked if he was keen

‘I just had a newborn, I’m trying to keep my options open…’ Karl responded then bursts into uncontrollable laughter after Sam asked if he was keen

‘Okay, this has taken a turn – and not for the best,’ she said, as she giggled alongside her colleague.

‘You’re a legend and I love you. Can’t wait to come to have a beer with you in Melbourne,’ Karl told Sam, wrapping up the interview.

‘Hit me up anytime mate, I’ll be waiting,’ the guest replied.

'Your a legend and I love you. Can't wait to come to have a beer with you in Melbourne,' Karl told Sam as the interview descended into chaos

‘Your a legend and I love you. Can’t wait to come to have a beer with you in Melbourne,’ Karl told Sam as the interview descended into chaos 

Karl then cheekily said: ‘I’ll send you my digits’.

Sam had been enjoying breakfast with his mates on Smith Street in the inner northern Melbourne suburb of Collingwood on Monday morning when he noticed a woman being harassed by an armed man at an ATM.

Leaping into action after hearing the woman’s screams, Sam tackled the man to the ground and held him until police arrived.

The incident was filmed by passersby and the footage later went viral as an example of everyday heroism. 

Springing into action: Sam had been enjoying breakfast with his mates on Smith Street in the inner northern Melbourne suburb of Collingwood on Monday morning when he noticed a woman being harassed by an armed man and tackled him to the ground

Springing into action: Sam had been enjoying breakfast with his mates on Smith Street in the inner northern Melbourne suburb of Collingwood on Monday morning when he noticed a woman being harassed by an armed man and tackled him to the ground 

Scene of the crime: The incident happened on Smith Street in Collingwood, inner northern Melbourne, on Monday morning after a 34-year-old woman had used an ATM to withdraw money

Scene of the crime: The incident happened on Smith Street in Collingwood, inner northern Melbourne, on Monday morning after a 34-year-old woman had used an ATM to withdraw money