Irony

Remember how I keep finding myself in ridiculous situations regarding those twins that I "know"?

Another funny moment with them: I am now friends with the one I did not know before (he's in my classes).  As I was walking out of the parking lot, the twin drove by and waved.  Well, for some reason I just froze, not knowing which twin it was and how to respond.  Was it the one I used to know or the one I know now?  Why couldn't I just wave, regardless of who it was?  I don't know, but I accidentally snubbed him just like he snubbed me two years ago.  That = irony.