A case of road rage has triggered a particularly messy accident in Hong Kong and should serve as an important lesson for those involved.

Dashcam footage from a truck shows the driver of a black minivan stopped in the center of a highway with one taxi behind and one taxi to the left of them. The taxi directly behind the minivan then pulls out and changes into the right lane. However, the minivan driver didn’t want to let them past and tries to cut them off.

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While this is all unfolding, the trucker with the dashcam is fast approaching the trio and is forced to slam on the brakes when the taxi changes lanes in front of them. The force of the braking sends gallons of thick, dirty mud being carried by the truck over its nose and across the minivan and taxi. The mud flies out of the truck so fast that it actually shatters the rear window of the minivan.

This video was shared to Reddit and it was initially speculated that this wasn’t mud but rather sewage. However, it has since been confirmed that it was indeed mud. While the two taxis that were covered in the grime should be quite easy to clean, the same can’t be said about the minivan as mud has poured into its cabin and removing it won’t be an easy task.