Ohh, sales assistants have another trick now! When you say "I'm fine thanks" they pretend they didn't hear you!
I can't remember which shop it happened in today. Oh yes it was a dress shop, sells resort wear kinda.
Then it happened a little while ago at a junk jewellery shop:
Her: "Are you happy browsing today?"
Me: "Yes, I'm fine thanks"
(pretends not to hear)
Her: "
Are. You. Happy, Browsing. Today???"
Me: "Bitch I'm outta here"