In my youth, converting to a C172, I had a tendency to fly the approach at PA38 speeds rather than the 10Kts slower that the 172 required.
The bouncing PIO's down the runway were a sight to be seen.
So - RoD normal, speed 10Kts too fast. As you flare you will either bounce off the ground, or balloon and PIO down the runway. Reason for this - the flare increases the angle aof attack and therefore increases lift, so bounce occurs.
RoD too fast on the other hand. Yes, you may bounce, though the more likely scenario is you'll slide along the runway with a very splayed and broken undercarriage.