Gotta add to my list. The 17 or 18 year old bag boy at the food lion store close to me. He always pulls this shit where he waits until you have like 2 things left to bag up of your own shit, then comes running over, "Can I get that for you sir?"
The other day, I had a jar of pickles and two squash left to put in a bag. He runs over, "Sir, can I get those for you?"
Me: "Nah man I got it"
Him: "Are you sure sir?"
Me: "Yes, positive"
Him: "100% positive sir?"
Me: "If you ask one more fucking time I am gonna flip"
Him: "Front flip or back flip sir"
Me: "...**shock and disbelief**..."
I shake my head and just give this guy "the stare" until he goes away. If I hadn't had my kids with me I would have tried to break his fuckin neck I swear to god.