Our cat Pete is rather curious:
He decided to investigate this plastic bag:
The plastic bag got caught on his collar, and he ran wildly through the house trying to get away from it. This freaked out our other cat, Bruce, who proceeded to bolt as fast as he could to his safe place – the lower window pane in our bedroom:
Amazingly, Bruce went right through the glass. (We later taped some cardboard to the inside of the window frame to close up the gap). We found him a while later and rushed him to the Veterinary Hospital Emergency at Murdoch University, where he had to get a number of stitches on lacerations to his leg and face.
Fortunately, Bruce managed to get away without more serious injuries (the glass was very sharp and we were rather worried). Unfortunately, he can’t go outside for a few days until his wounds have healed. Poor Bruce. 🙁