I'm trying to remember the name of a short story I read about 25 years ago or so. I'd also like to know of any collections it appeared in.
The details I recall involve a family who are embarking on a hyperspace journey. To undertake this journey you have to be put to sleep. One of the children pretends to be asleep, and when the jump is complete the child has gone insane. From the child's point of view the jump lasted for an eternity while in reality it was only a few seconds.