Going on a vacation, so notify all clients that I won't be available during two weeks.

Client: well we have this huge presentation and here's a list of stuff we absolutely need for it
Me: sure I have a look.
Me: holy shit dude! That's gona take about 2-3 days. I'm leaving soon!
Client: it's realy critical to have them in a week as it's a very important presentation! Is there any way you can make it work? If we can do anything to help, just name it.
Me: well I'll do my best (planed 1 day for such rhings)
Me: *pulling a 15h day*
Me: here, all done budy! Did a 15h but now it's done, so do that presentation!
Client: oh, nice, but it wasn't that urgent
Me: ...

Next day:
Client ssh in to the server, fucks shit up
Client: well I did a thing and now stage and prod is fucked, can you do anything?
Me: (knowing it will take 30min to fix) well... I try my best. Btw. I'll leave in a few hours and won't take my computer, so try not to fuck every thing again, okay?