This is rather an odd one to remember, but I can hear it as clearly as if it just happened. On chilly mornings, I would lie in bed and hear Dad go down in the basement to ignite the fuel oil furnace. There would be the squeak of the door in the furnace as he opened it, a whoosh as he ignited it, then this "Kar-CHUNG" sound from him as he cleared his throat and sinuses.
