The sequential pictures of the bird dropping the berries was within 1 minute. I can't say how many seconds, but it was all quite fast. Probably something like 10 seconds, but not sure.

I don't know how fast the birds became drunk, as they had been eating the berries already before I arrived with my camera. It probably doesn't happen too fast, but when they're eating a lot of fermented berries. All the birds have to do is to find berries and eat them, so they have time.