Another unfinished sentence of mine and some responses it received in January 1989:
The most useless, superfluous expression one can utter is...
..."Trust me." (Scott S.)
..."Are we having fun yet?" (Robyn R.)
..."Can you believe...? It was in the last place I looked." (Betsy B.)
..."I know exactly what you're feeling." (Sue A.)
..."Ooh! I bet that hurt!" (John O.)
..."Are you alright?" i.e. "You seem to have fallen off a 300-foot cliff. Are you alright?" (Jen E.)