You are viewing a single comment's thread from:RE: The carnage after the storm #LondonMarathonView the full contextshanibeer (68)in #running • 6 years ago Messy. What are the gas canisters for?
I believe they contain nitrous oxide, or laughing gas, that people use as a recreational drug. Not really congruent with watching one of the best and most inspiring marathons in the world.