A driver got behind the wheel and allegedly inhaled hippy crack after the Mercedes flattened a metal bollard.
Two men were spotted by the dark blue Merc inspecting the damage.
One dressed in a black hoodie and jogging bottoms can be seen clutching a bright pink balloon.
He holds it close to his mouth as the other man in grey T-shirt and shorts gets into the £50,000 motor.
The driver reverses backwards off the bollard.
His friend then taps the damaged, front passenger side wing of the 18-plate car before jumping in.
The Merc carried on down the road in Whitechapel, Tower Hamlets, east London on the afternoon of 29 June.
But both men were holding pink balloons to their mouths as they drove off.
A shocked onlooker filmed the worrying scenes in broad daylight.
Local Ben Wakefield said: “Couple of little taps will fix the bumper nicely.”
Chris Docherty echoed this, adding: “A couple of slaps, that should do it, jobs a good’un.”
Ahsen Reza joked: “Have to give credit to the build quality there.
“Bollard is lying flat but the bumper and headlights are still intact.”
Another joked: “Jumping to conclusions.
“Could be two clowns late for the kids’ birthday party.”
Nitrous oxide – aka laughing gas or Hippy Crack – is now a Class C drug in the UK.
It is bought in metal canisters and inhaled from balloons.
Lindley Street, in Whitechapel, east London (Credit: Jam Press)
A Met Police spokesperson said: “Officers were informed of a damage only collision at 7:48pm on Thursday, 29 June on Lindley Street at the junction with Sidney Street, E1.
“A car was reported to have collided with roadside furniture and then left the scene.
“Officers attended and noted damage to a bollard, the matter has been recorded and enquiries continue.”
