The accelerator of a diesel van was stuck down.
Fire crews have shared a video to explain what all the smoke was about in Sidmouth last night (Monday 7th October).
They were in the middle of a drill, when they were called to reports of a small car fire on the High Street.
The accelerator on the small van was stuck down, and diesel fumes filled the High Street - including a shop.
Crews used a van to clear the fumes from the shop and said "Diesel fumes while very unpleasant carry a lower amount of carbon monoxide than a petrol engine."
The van eventually ran out of fuel.
You can see a video of the incident on the Radio Exe Facebook page.
Paignton man wanted by police
Taxi driver warned after third speeding ticket
Murder investigation underway in Plymouth
Attempted murder arrest after alleged Newton Abbot stabbing
East Devon food bank readies fundraising push
New Dartmoor boss says job is a dream come true
