Circuit that can be used in order to kill a relay by switching it on and off really fast and thus creating high voltages that get switched over the relay very frequent. the arcs get kinda hot and cause the relay to burn in at some point... Here these high voltages get stored on the capacitor but sadly this doesn't work to good in the simulation. But in RL its worth a try. Better be careful with the capacitor value it could kill you. Without the capacitor it is harmless (For you not for the relay).