If you must crash, do so early
The Thursday of Bathurst 2017 was potentially the most action-packed this side of the millennium.
Four cars in total crunched the wall through the day's three hour-long practice sessions; LD Motorsport's Alex Rullo, Garry Rogers Motorsport's Richard Muscat, Freightliner Racing's Tim Slade, and Kiwi Shane van Gisbergen. Slade and van Gisbergen's crashes were particularly damaging - both cars having collided with the concrete on the run to The Dipper.
While such crashes would be potentially weekend ending had they struck on a Friday or Saturday, both teams have ample time to action repairs.
Don't underestimate availability