It is wrong to stab cab drivers
Peter took a cab home from the bar and ended up upsetting the cab driver by tipping too little.
Peter wants to resolve the argument.
Peter kicks in a few more dollars, placating the cab driver.
Peter stabs the cab driver repeatedly, causing him grave injury.
Peter gets out of the cab and sleeps in his own bed that night.
Peter is arrested for attempted murder and spends years in prison.