I once had a Holmegaard suncatcher that turned out to have a sun allergy. I hung it in the evening, and the morning after I was awoken by a pop and a clatter as it clean broke in half in the morning sun. Oddly, the half that fell off and struck the windowsill didn't break further. Glass is a very confusing thing when it comes to its fragility.
But a few dabs of epoxy resin later, and it now hangs in a much shadier window. :hiclp: