I got a funny one for you. A customer is bringing his 6X12ft trailer all mounted with screws so he offers me to help removing them so I replied OK. We booked the installation for the next week and the guy made like 20 calls everywhere to get the star-shaped bit to fit his drill. He showed up and said: "sorry buddy, I offered you to help but haven't find the damn bit needed to remove the screws so I'll go slowly with WiseGrip® hoping not to scrap the paint..." I just took a deep breath, bite my tongue not to laugh and roll on the floor... I replied: "I got the bit buddy... is that the 8 points star-shaped ones on the trailer?" He said: "yes... I've been told it's exclusively for the trailer makers..." So I went with my killer line: "OK, a li'l maths here... 8 divided by 2 = 4 so any Robertson #2 square bit will do it... sorry to hear you turn the world upside-down for that".
After a second, the guy started laughing very loud and realized he was so stupid.
He made my day...