You wait patiently while the customer fumbles around. You notice that they are getting more and more frustrated. In a snarling terrifying voice they roar:
"I KNOW I HAVE IT IN HERE SOMEWHERE"
The clerk, who looks like if the kid from middle-school who ate his lunch in the teacher's room rolls his eyes and says:
"Ma'am if you don't have a receipt, then I can't give you a refund for the game."
The customer which you now recognize as a mature Grudlack Warrior roars at the small skinny clerk:
"GIVE ME A SECOND"
"Ma'am, if you could just step aside so I can help the next cust-"
The warrior then rears back and fires a stream of radioactive saliva at the clerk who screams in agony as the acidic fluid dissolves the clerk into a pile of mush.
Draw the Sword of Promised Truth
Do nothing
Leave the store