Mount Panorama has not wasted time notching its first victim at Bathurst 1000 practice.
Tim Slade's Holden is out of action until Friday after a nasty crash just 30 minutes into on Thursday's opening session.
Slade walked away from the accident but was still the high-profile scalp after the Great Race's first two eventful practice sessions.
Slade's Brad Jones Racing (BJR) team are working overtime to have their extensively damaged Holden repaired in time for Friday's qualifying after slamming into the wall at 176km/h.
Teenager Alex Rullo's Holden also did not take part in the second session after suffering suspension damage in an opening-practice bingle.
Ford gun Mark Winterbottom's teammate Dean Canto was fastest in the second one-hour practice stint featuring only co-drivers, clocking two minutes, 06.32 seconds.
Ford star Chaz Mostert (2:06.30) was fastest in the opening session.
Thursday's final practice featuring the full field starts at 2:45pm.
BJR's rotten luck continued in the second session.
With Slade's Holden being worked on in the garage, his co-driver Ash Walsh was given permission to race BJR's other Holden in the second session, only to find the sand at The Chase after two laps to warrant a red flag.
Walsh, 28, did well just to get behind the wheel after suffering rib cartilage damage, lung contusions, a nasty case of whiplash and a leg wound in a 290km/h crash last week testing a sports car on Phillip Island.
Walsh rolled the car four times last Thursday and had to be airlifted to Royal Melbourne Hospital from the Phillip Island test track.
Walsh was allowed a handful of practice laps on Thursday in BJR's Nick Percat entry for a fitness test before he found the sand.
He sounded confident of racing on Sunday despite flying from Brisbane to Bathurst this week with a doctor and a physio.
"It's more a dull pain. It's at the forefront of my mind but, hopefully, I can manage it," Walsh said of his injuries.
Thursday's second session was also stopped by a red flag after Holden's Richard Muscat skimmed the wall at The Dipper on top of the mountain.
But Slade was the talking point after crashing out on Thursday morning while topping the practice timesheets.
"That's how unforgiving this place is - that was just a small mistake," Fox Sports' Supercars great Mark Skaife said of Slade.
A shaken Slade put his hand up after the incident.
"Obviously, I was too fast," he said.
"We made a change to the front tyres and the car was awesome but I clipped the wall pretty hard."
Holden veteran and six-time Bathurst winner Craig Lowndes believed the mountain had taught Slade a timely lesson.
"You have to be smart about it. He has now lost two practice sessions and that really hurts your weekend," he said.