I've been through a few No-touch lazerjet washes in Canada where you drive over the first jet to get the salt washed off the underside before you start. Handy for winter drivers. A big fan comes on at the end and blows you off.
just goes to show how bad car wash's are , cant get better than snow foam and 2 bucket method for cleaning the car , and i was doubtfull of that until Robbie detailed my last car and i washed it with a sponge and undone half of his good work ,