The Reddit xkcd 695: apparently CERN scientists couldn't handle the sad ending contains the following image.

In the 2nd to last panel of the bottom added-on row, the text looks like it says

Sorry for the delay, we had some problems with switching to 25 ns.

I've changed case. It's written in all upper case but that's considered unaesthetic in posts except when it's a block quote from a teletype-like output.

I'm thinking that it could stand for N s (Newton-seconds) or ns (nanoseconds) but the 25 wouldn't make sense.

What could this mean?

• Related: imgur.com/VbKV9DF first saw in @Hobbes 's comments in chat. – uhoh Jun 14 '18 at 5:03