Skid mark

Skid marks can be analyzed to find the maximum and minimum vehicle speed prior to an impact or incident.

Loss of the rubber feet or foot causes the aluminum stile to make contact with the ground, and if a hard surface like concrete or tiling, a skid mark shows how and why the ladder slipped.

Such marks are important evidence for vehicular accident reconstruction, when their size and shape can reveal much about vehicle speed and forces of acceleration or deceleration.

[Note 1] In modern slang, the term "skid mark" means a fecal stain or smear on the back of one's underwear.

[4] It may also apply to a pet experiencing anal irritation and sliding (or scooting) across the floor to relieve the itching or obstruction, leaving a line of feces behind.