The only downer is I ate something dodgy there and have had pretty bad food posioning today. Dodgy #$%!& hot-dogs... 
Write a letter of complaint: at those prices, you should be able to expect to have your own personal surgeon following you round for the next three weeks, correcting any bodily mishaps with even the most meagre chance of a relationship to your wembley hotdog (this may include brushing your teeth for you after the gig, and possibly wiping your arse if you're that way inclined).
Possibly a gold plated surgeon if you go for the "mega deal" Half a burger, two chips and some watered down coke £525.