"Smile it might never happen..."
I was walking back through my local town centre after visiting my ma in hospital (and as such i was in an AWFUL mood) and this guy handing out leaflets said it as i walked past him, so i turned around and snapped: "No, Not with you around..."
Not my proudest moment but i guess we all have our bad days. At least i didn't take all his leaflets and chuck 'em up in the air.
I haven't been nasty to a street vendor since though, so i guess thats progress!