>>8944187He has the ability to do this for whatever reason.
Is it a ramming thing? Is it to go faster? Who knows.
What I can tell you about it is that NIghtbeat isn't involved at all. It's a spring loaded action gimmick completely divorced from any minicon interaction.
What Nightbeat can do however is flip around and hide away inside Sideswipe for some minicon storage that only Tidal Wave really replicates.