anything can and will happen.
Many years ago our uncle wanted me and my twinsy to be able to protect ourselves. He was a bit of an oddball so his bright idea was butterfly knives. Easily concealed, easily pulled out and usefull in close quarters.
Also look really cool when you flick them around.
I trained with mine for 10 years from when I was 14 to a year ago, my girlfriend always hated having knives in the house.
Mine are currently at my twinsy's house.
I'm still incredibly handy with them.
Remember that if the idea to kill Mel off ever crosses your mind.