Power was out in my store today. Guest comes to drop off prescription. Explain that our system was down due to the outage.
Guest: so when will it be back on?
Me: I have no idea. They haven't told us anything.
Guest: what, 20 minutes or so?
Me: I really have no clue. It could be an hour or more. We don't have an estimated time. I can call you when it's ready or if you need it immediately, you might want to go somewhere else that has power....
Guest: no, I'll just wait
Me: are you sure? It could be a while
Guest: I'm sure.
(20 minutes later....)
Guest: is it going to be much longer? It's already been, like, half an hour and I have other things to do today
Me: I'm sorry, but we really don't know how long it's going to be. We can call you or you might want to go somewhere else....
Guest: well, if I knew it was going to take so long, I would have just gone home in the first place! Just call me when it's done!