So here I am with a friend for a coffee, and there are three girls a few tables away. So I look at them for a second or two but one of them was wearing shades so she probably saw me. So i look again again (later) the other one was staring at me dead on the eye, aaand so did i for 5 seconds(stare down lol) then she looks away and starts laughing at her friends( sorta commenting with them what just happened). Soo?? Opinions on what should i have done, or did wrong. THANKS