I bet you have no idea how silly the London Marathon can be.  

We all know Brits have their quirky sense of humour.   Sure most of it is childish and a little over the top but I get a chuckle (= a laugh)  now and then. You have no idea so many people ran this many miles in ridiculous costumes, did you?  Are there costumed people in the New York or Boston marathons?  Certainly not mobs of them. 

Check out these costumes at this year’s London Marathon: