Cars have a lot of liquids inside of them, and while dismantling them, they tend to spill and make a mess everywhere. Also if the car is old there can be a lot of dirt and metal that falls off due to rust underneath the car. So it's always best to keep your area clean so you don't slip. Mop up the spilled liquid and brush up the metal. Also always place used and dirty rags in a container to be taken out for washing.