Got this from another site, some funny ass answers, So lets see what you guys come up with.  
Rules: 
1. Must be bought from walmart 
2. Only can be 4 items 
3. No self check out 
4. The cashier is a middle aged person.       
I'll start   
1. Shotgun 
2. Ammo 
3. Butcher knife 
4. Garbage bags...