Pick DS 6yo up from school and stop at shops for lunch that can be recycled, composted etc (to do with school trip tomorrow)
DS is going through that stage where 'lifes not fair', everythings 'uurrgg '................. I'm sure theres more but I switch off 
So he starts again whinging about having to go in 1 shop for bits, then about cartons of drink (told to get them but now they have to have sports bottle) etc. I reason with him etc but it fails so fairly loudly tell him 'I've had enough of him moaning even when things are for him and I'm going home' 
Turn around and walk straight into a lampost and have a fabulous black eye. 
DS blames me, I blame the lampost and I'm hoping the lampost hold DS responsible for me assualting it.
Who's BU?