We all know smoking damages our health, but one YouTube user has created a video that really hits the message home.
With a DIY science experiment, vlogger CrazyRussianHacker demonstrates how many chemicals are left in the body after smoking just one cigarette.
He places a white coffee filter at one end of a vacuum cleaner and a cigarette at the other, using cardboard to stabilise his apparatus.
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He then turns on the machine to mimic the process of smoking.
The cigarette quickly burns down, and the vblogger holds the yellow-stained coffee filter to the camera.
"Look at the dirt inside of it, just from one cigarette," he says.
It's enough to put even the most die-hard smoker off cigarettes.
H/T: The Metro