Simon Pegg. I worked at the Natural History Museum. That day I was on the ticket desk for a dinosaur exhibition that was very popular (it was an extra hall of dinosaurs for one summer in combo with the usual exhibit). On busy days we were often at capacity, and would offer people the option to either queue up for 15 mins or so, or book themselves in for an hour or two’s time. Pretty much everyone was happy with this arrangement.
Simon Pegg showed up with his family when it was full, and there was a queue of expectant children, and when told he wouldn’t be able to go in immediately, threw a strop with my co-worker and pulled the whole “don’t you know who I am” thing and just made an idiot of himself and pissed me and the other ticket person off a lot. So he basically wanted to barge in front of a load of children to see some animatronic dinosaurs and was a dick about it. His kid was a baby in a pram, so not really even old enough to be excited.
Majorly put me off him after that incident.