Oh yeah, looking at the footage, I definitely wouldn't fault you for that one (But then I'm not a Ref

).
They were moving under their own power, and the block came out when they were turning, not being pushed.
You know, I wouldn't be very surprised if FTC eventually followed in FRC's footsteps and started requiring some sort of bumpers. But then, that would only encourage the people who call it "FRC lite".