I was just thinking how odd it would be if random, everyday objects just suddenly changed colour. Like, boom, now all bananas are blue, or all blood is yellow. What sudden change of colour in an everyday object would freak you out the most? Or, if not colour, what change of size, smell, texture, e.t.c. I think the blood thing would freak me out pretty bad. Just imagine having a nosebleed and discovering that an unknown neon yellow liquid is running from your nose.