Does God get Mad?

Is there anger before the Holy One, Blessed be He?

Yes, as it is taught in a Braita: God gets angry every day.

And how long does His anger last?

A moment.

And how long is a moment?

One fifty-eight thousand, eight hundred and eighty-eighth part of an hour.

Only Bilam the Wicked knew exactly what time of day this moment is.

(Brachot 7a)