rutsva: area of burnt grass
riva: trap with a falling flat stone, for catching small animals
One who sets a trap in burnt veld should be prepared to have his backside soiled.
When setting a stone trap, one will most likely sit on the ground while doing so. In burnt grass, the backside becomes soiled with ash as a result.
One must be prepared to face the consequences, or deal with any inconvenience resulting from their actions.