I once, 30 minutes into what was supposed to be a 1 or 2 hour phone interview, had an engineer at Google cut me off in the middle of their standard "write code in a Google Doc" with a "oh, I have a meeting I have to run to, good work we'll get back to you."

I assume it was not, in fact, good work, as I did not progress to the next interview.

I think a phrase like "typical" would be inaccurate; possibly "common" as well. But, I think, most people who have interviewed a decent amount have at least one story like this. Cursing is another step beyond, but its not insane; many of the people on the other end simply get drafted, they don't want to be there, and in some companies even see you as a threat to their career advancement.