How to kill an enemy politely ?

There was this mission in Borderlands 2, given by Karima, where she asked you to retrieve the medicine from some walking-caravan and also asked me to kill them politely ... if i can. And i was just wondering, how does one kill an enemy politely ? You just go to him and start blabbering : I am deeply sorry, my enemy for what about is gonna happen' with you. Being the need of killing you for achieving my purposes, can be very bad for you and i just still need to say that fighting me back, won't help you. You see, i can respawn endlessly, that means that you will meet me, again and again until i kill you.

TL;DR - BOOM! HEADSHOT!

To make it more interesting, i'll make a giveaway soon - The game will be "To the moon" - Just because my very good friend "DeltaBladeX" has it in his wishlist :3

Edit : I have to add, the caravan is formed of 3 entities, one human, 2 robots. You need to adjust your ideas on that. And stick to Borderlands 2 physics. ( There's no fall damage i mean )

6 People are in at this moment. Only 2 of them are known as which will be in, the others and the next to follow will be announced "politely" by adding them to the friends ( After i make the giveaway ).