Sorry to hear about everyone's spike unfortunes! (And especially yours mimigirl)
I'm a student still living at home and one of my parents left a window open near one of my phals (on a table), and the wind picked up the curtain and sent the phal flying...breaking two spikes at once...
I might have slightly told them off for being careless (oooh) WHEN, about a month later, I knocked the spike of one of my other phals with my shoulder and broke that myself!
It's as they say I guess: Accidents happen!