Missing beats round (2)

Blondie's "Heart of glass" may not be as great as you remember it, but there is a moment of towering genius at 2 minutes 0 seconds in (at the start of the instrumental bit) where they miss the fourth beat off the end of each two-bar phrase, or if you want that mathematically, you can count it in sevens. They then start humming along at about 2 minutes 20 seconds without the missing beats (so you can count in eights again). I think on the twelve inch version of the song they mix and match both towards the end.