Could be...

I haven't listened to the song for a long time so I'll have to refresh myself when I get home from work tonight...I do seem to remember it was three sounds, like "Hey, what's up"

I have hung onto the memory for so long because back then I was a HUGE, HUGE Rush fan. I knew all the lyrics to all of their songs up to that time. I saw the "Moving Pictures" concert at Maple Leaf Gardens in Toronto (was there a better place to see Rush?) that summer...so I was dumbfounded to hear a "mistake" in one of their songs...If it was intentional, then look at all the discussion it generated ha ha...

I'll get back to you with the time index soonest...

John