With the recent announcement at Cern there have been many video clips published describing the Higgs field. They show heavy and light particles passing through a field and the commentary says that the effect of the field is to slow down particles and thus give them mass. The Higgs field supposedly permeates empty space. As we know particles travelling through empty space continue with constant velocity and momentum. The Higgs field description suggests that particles travelling through the Higgs field are slowed so the more they travel through the Higgs field the more they should be slowed down. The Higgs field theory seems to be inconsistent with observation. Can anyone explain?