Oh, now i see.
Ouch, GG.
Well actually i thought you're gonna trap me on the left of the cross, so I just started building on the right hoping that i won't get trapped. ^^"
Well, really didn't think of that angle, I just thought that, in order not to damage anything, I should have just put the piece over your stack of two because it lined up with my other piece on the top, but nothing special.
Didn't play Connect 4 in ages, but I'm pretty sure I never had a game this challenging.
EDIT: well, I just meant that I was going for the same tactic on the other side, but failed to notice that bit.