Tried a few of these in combos, heres how it went:
JC: Hey [HB], just got back from the aquarium... reminded me of u ;p
HB: Wait what? a fish reminded u of me? thats strange :p
(an hour goes by)
JC: Congratulations
(30 minutes goes by)
JC: OMG stop talking so much!
HB: ur a loser

JC: In 2009 the U.S. govt will.......wear a helmet, and run!
HB: Ive got that like ten times! I guess ima retard
JC: Well obviously a well liked retard

ur retardness is ur 2nd most attractive thing you have...
HB: Well whats the first then?
JC: Wouldnt u like to know?
I already have some c&f built up with this girl and it led to a pretty interesting conversation l8r that day. I guess you can over do it, over all I think it made me look desperate attempting to stack them. It all depends on the HB and timing. Definitely do not attempt to do these on a Fri/Sat night, which shows that you're thinking of her instead of having a good time and seeming unavailable.