Sheer stupidity ????
I once asked a friend of mine if a bug knew it was going to be squashed just before I crushed one, I said do you think they see a white light befor everything goes black & then they feel themselves getting crushed - you see I'd scrunch up a ball of white toilet paper & use it to crush the bug, anyway he said as a bug's brain was smaller than a pinhead he didn't think so
When I was flatting on my own I found a giant tarantula spider in my kitchen, I got the chap from upstairs (a meterologist) to come & kill it for me he picked up my egg-lift & flattened the spider - I never ate eggs again after that...