$13? Damn. Outside of the IMAX debacle that shanked me with Superman Returns, I usually pay around $7-8 to get into the theater. No biggie
Although when I went to see Eragon the ticket was $11 wtf
You saw Superman in IMAX?
You paid $13 to see Superman?

NO
My brother begged me to take him so I said alright fine, it looks good. So he orders the tickets on the phone, and the next day I pick them up. The day after that we head to the theater, at which point the bastards reveal it's an IMAX showing. Now the tickets said nothing about IMAX, and I thought it was pretty shady.
To make matters worse like 10min of the movie was 3D. I was so pissed I kept the goggles on, only to have some asshole behind me whisper "hey buddy, you only put the goggles on when the screen tells you to." Motherfucker I spent $13 for these things, I'll wear these whenever I want