Oh dear, I've had quite a few of these moments... I started cubing properly after solving the cube without any guides a few months before christmas, and I have got a Ultimate Lubix Guhong and learnt 2 look OLL and PLL since then, and I practise quite a lot a school, and I have had people say thing such as:
"If I stamp on it then you wont be able to do it."
"OMG I know someone who can do it in like 3 minutes, he is well quick. [I just solved it around 40s infront of her]"
Them: "How do you do it?" Me: "I keep turning it until its solved, completely randomly, I'm just luckier than everyone else." Them: "REALLY!? :O"
"Wow look at him strum it!!!" [Doing an alg with lots of M2's]
"You are so close, just 1 edge out of place [They could only see 2 sides, with a 3-cycle PLL left]." I start algorithm "Oh no, you have messed it up now." I finish. "OMGGGGGGGGG YOU HAVE JUST DONE IT !!!!!!!!!!!!!!!!"