I've never had that done to me. Now I'm upset.

Now I need a technique to deal with such an occasion...um...
OK I GOT IT! I'll stop, slowly look down at the leaflet, then slowly look back up at the person, then slowly look down at the leaflet, then slowly back up at the person, then jump up in the air and yell "WHEEEEEEEEEEEEEEEEEEEE!" and hurl the leaflet in the air too. Then say "Have a great day, Jeremy", smile, and calmly walk off.

Hmm...not bad. Now I really want someone to do that to me!