crazy foaming?

So I just opened my latest AG batch of beer, and it seems that when I go to pour or even just leave it in the bottle it just foams up a ton. It foamed out of my bottle and filled an entire pint cup(in foam) and still more than 3/4 full in the bottle. Ideas? I do know how to pour a beer...
Daum

Some of my early brews did this.

What did you prime with?
How much?
How long has it been in bottles out of the fridge?

and not that important...but what kind of beer?

You could have a problem with over priming, or just letting it sit and carbonate too long.

Also, I have no idea if this is true, its just from personal experience. I seem to have more foam problems when I prime with priming sugar. I've had much more predictable carbonation priming with DME. YMMV

http://homebrewtalk.com/showthread.php?t=30449&highlight=chainsaw is what i was brewing. Primed with normal priming sugar, 5oz, been about 2 weeks in bottles out of the fridge.
Daum