Two or more people whose wrongful actions in furthering a common design cause a single injury. For example, if two men searching for a gas leak both applied a naked light to a gas pipe and caused an explosion, they are joint tortfeasors. But if a single injury is caused by several people acting without a common design they are not joint, but concurrent tortfeasors. An example of concurrent tortfeasors would be two motorists in separate cars, both driving negligently and causing a collision in which a pedestrian is injured. In both cases, the injured claimant is entitled to sue any or all of the tortfeasors for his whole loss; if he obtains a judgment against one tortfeasor that is not satisfied, he may proceed against the others. A tortfeasor liable for damage may recover contribution from other tortfeasors (whether joint or concurrent) liable for the same damage. See civil liability contribution.