An amusing video has emerged of a man firing an RPG at a petrol drum while on holiday in Cambodia.

The footage, captured by an Australian tourist, shows the man taking aim at the petrol barrel and making it explode.

The video was taken at a military base in Phom Penh, with the supervision of trained military personnel.

"Over a few beers with mates in Cambodia we talked about going to a gun range. So we did end up at a military base and I ended up buying the rpg also with a petrol drum," the filmer wrote online.

"The first three times I shot it and misfired so once we finally did shoot and we hit our target it was one hell of a adrenaline rush."

Over a few beers with mates in Cambodia talk about going to a gun range so we did end up at a military base in phom penh i end up buying the rpg also with a petrol drum the 1st 3 times i shot it misfired so once it finally did shoot and i hit my target it was one hell of a adrenaline rush .