Stuck at "Samsung Mob!le" logo--ATIV S

[xScaryKidx]

Downloaded the 8.1 Preview Build and it installed, I guess... but now I'm stuck at the "Samsung Mob!le" logo... what now? Wait for it to disappear...? Don't want to reset the phone 'cause there's a lot on the phone that I haven't saved yet.

Thanks in advance.

 

[BIGPADDY]

Wait for 30 minutes if it still stuck do a soft reset hold the power button and volume down button until it vibrates.