When you max your bonus bar in Boom Boom Rocket, you can then trigger the bonus round, which has a X16 multiplier, and when it's over, it goes back to X2. How many times per song can you do it?
I've never had it happen more than once per song, except when I press start to pause the game. If I pause, unpause, then get back to max, it gives me another bonus round, and I can just do that all the time and spend half the song in bonus mode.
Did I miss some key gameplay element or did I find a bug? O_o