I don't always, but if I am driving in 6th and some semi tries to run me over or something, shifting into 5th doesn't really get me into my powerband. Or, when I slow down for a turn in 5th and accel out of it in 3rd.
Either way, it still has happened while just downshifting one gear also, but not as often.
Am I the only one who downshifts more than one gear at a time?