Was it stated Susan was an expert skater anywhere?
'Ginormica' escapes the giant robot using abandoned cars as skates,
then 'Susan' escapes Galaxharr's ship through the robot bay on skate-like
floaters that fell off a hover-scooter.
Maybe it was edited out or it cost too much to show but...
The photos in her house could have shown her skating.
She could have had skating trophies in her bedroom.
Did I completely miss the clue that she had skating experience?