what causes a one time smoke from exhaust?

i recently had radiator changed and there was a lot of residual coolant left over from where the old radiator went bad.i tried to wash area where coolant was put in to "clean"the area.i noticed some smoking from exhaust but it went away after driving up the road where i could see better under the lights.i wonder if i just got excess coolant/water in the areas of the fuel vapor canister where i poured water or could it got in the crankcase ventilation hose?car never smokes and is not smoking now.what would make a car smoke just once like that?