I think where people would fall down with the challenge in the OP is that you have to eat the salad and chips too. What's the betting theres about 5kg of fries to eat as well?
:-/Should you become ill, the contest is over... YOU LOSE! (Please use the container provided as necessary.)
The sides aren't that big, however I think people are under estimating just how much solid meat that is. Is two kilos put that in perspective a very large buRger you'll get two per 500g of mince. Your talking 4 packs of 500g or 8 of the big burgers.