Aryth

There are only a handful of cases where a sneeze (or suppression of a sneeze) have caused an aneurysm (which could be burst by any [suppressed] sneeze afterwards). But, if you suppress a sneeze by holding your nose, the increased chest pressure could do the trick. As for the eyes popping out... Absolutely not. You would have to have weak bones, but yes, it is possible.

A lot of traumatic dreams can recur frequently. Also, events that have ties to many different memories may recur from time to time. All in all I would have to agree with Ninjakat though, dreams most likely recur because it is a memory. Though the most frequently recurring dreams tend to be the most frightening, most traumatic or most frequently revisited memories.