Respuesta :
The man said "thank you" because since he is walking in the desert and asking for glass of water so he has to be thirsty. When the waiter pulled out the gun and about to kill the man , he rather die than to live of thirst.
Because he sprayed him with water to quench his thirst.
(the gun was a water gun)
I hope this helped!
(the gun was a water gun)
I hope this helped!