Stuck at Samsung 3 logo and "Downloading..." odin mode

A

AC Question

CynogenMod notified me of updates so I went with it and when it rebooted my phone it was stuck in "Samsung logo". Then I tried to get to recovery mode by "home+power+volume down" and it gave me the screen of "Warning! A custom OS can cause critical problems..", now if I press Up it's stuck in "Downloading..." and if I press Down it's stuck at Samsung logo.
What can I do?
 

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