Well...
Terra Nova would probably grab the mugger then follow after and confront the "victim". He would first chide the "victim" for not placing his used mugger in its proper receptacle. Used muggers should not be just dropped where ever you feel like, for that is littering, and littering is BAD (Terra Nova has this … thing about littering and pollution). He’d then ask the “victim†for the handgun. Assuming that the handgun is handed over (Terra Nova is also a very intimidating human-shaped pile of soil, most people do as he says) Terra Nova would then take the mugger back to his garage (he owns a auto-body/general auto mechanic shop in what was the worst part of Baltimore before he moved in and cleaned it up). TN would then make sure the mugger was OK, wake him up, and attempt to find out why he was trying to mug the “victimâ€. TN would assume that the mugger needed drug money, and TN HATES drugs. He sees them as just another form of pollution, a pollution of the body. He uses his garage as a training school for neighborhood youths, to try to give them another means of support other then crime, and to hopefully give them the willpower and self confidence to not need drugs to get by. He would probably try to help the mugger out as much as he could, either getting him in an addiction treatment program, or a job training program. Now, if the mugger doesn’t want to be helped, he’ll be told he’s just gotten his one free crime, and if TN catches his again…it won’t go so nice.