Let's take a 737 or an A320. No passengers, little fuel, sea level, level flight.
I fully open the throttles (without exceeding engine limits).
I ignore any overspeed warnings, and override any system limitations.
You with me?
Should you find a bird at these low levels and high speeds, you might better perhaps rethink your actions.
In addition, if Vmo was exceeded at low levels with a more classic swept-wing jet aeroplane, the B707, you would rapidly notice increased nose-up trim (mach trimmer action) that would soon run out of stabilizer authority...bad, very
bad.