On the last Brevet we had a rider come real close from using Tiger Balm which caused a loss of blood to his legs and he bonked hard and barely kept from passing out on the side of the road. He said his doctor friend said he was really lucky and should have had his good samaritans take him to the emergency room. Apparently Tiger balm is meant to be applied to skin that doesn't have expanded poors from excersize and a few other things that occur because of excersize that I can't remember. Anyway, applying it during excersize caused much more than normal to be absorbed through the skin and basically caused an OD type reaction.