I saw this happen on the…
I saw this happen on the hiway in Canada by Niagara falls a little ways ahead of me.
The whole front collapsed. The driver was able to have enough pull to direct it into the left shoulder out of the live lanes. He was in the left lane when it happened so he was good.
The wheels didn't just bounce away, they were still attached. But the front end was grinding along the pavement. No warning, just snap and drop.