Andy Lee and Hamish Blake knew they had gone too far when stockpiles of their blood type were on stand-by for a landmine stunt in their latest Gap Year series.
The heated scenario occurred when Lee and Blake entered a paddock in Cambodia, which contained hundreds of uncleared landmines from the Vietnam War.
The Aussie lads were shooting a scene for their latest gig, Hamish and Andy's Asian Gap Year, which starts July 8.
The pair accompanied a former boy soldier of the Khmer Rouge as he showed them how to dismantle the explosives using the traditional, yet primitive method, of a knife and a stick.
"We found one, and he said it takes 10 kilograms to set one off and just to prove it he starts playing it like it's a bongo drum," Lee tells AAP.
"It's kind of funny but it's not and it was a strange day."
Before they were allowed to enter the paddock, Lee and Blake had to provide their blood types so supplies would be readily available for surgery if anything went wrong.
Lee admits the stunt was one of the scariest they have ever done for the Nine Network series.
"They had multiple bags of our blood ready," Lee says.
"You kind of knew then it was more serious - and it's certainly not a funny piece.
"It's in a paddock which hasn't been cleared yet so we decided not to play any ball games."
While the landmine stunt was deadly serious, the rest of the trip through Asia was light hearted, living up to Lee and Blake's jovial reputation.
One prank included completing 250 laps of a roundabout in Vietnam on 49cc motorbikes.
"We had pit crews each and it went for about four hours," Lee says between chuckles.
"It will appear the silliest thing we've done but it was the most gruelling because it was 36 degrees (Celsius) and we are wearing leathers."
Other stunts by duo include making a five-metre homemade sky rocket for a rain god festival, then there's the visit to a Thai village where there are more snakes than people.
"The landmines are not that hilarious, but when we went for instance to visit a place that has monkeys as waiters, that was funnier," Lee says.
During the series the pair use Bangkok as their base, where they convert a local bar into a TV studio to accommodate ex-pats and locals to watch the show.
While the duo have already done Gap Year shows in Europe and the US, Lee expects there will be another one in 2014 because "there are still plenty of places to explore."