The 27-year-old suffered a crash during his seeding run and went into the first final round with a sore shoulder which hampered his chances of finishing within the top two of the heat.
While Wednesday's event has seen multiple crashes as each skier tries to be the fastest down the mountain, Grimus joked that he prefers it to the thought of having to compete in other freestyle skiing sports.
"Put it this way, I'd much rather do this than aerials," he said.
"I guess it's all a matter of if you're comfortable with what you're doing and we train day in, day out, off the snow and in the gym. We've got great support from our nation in that and, like anything, if you do it once, if you do it twice, you're going to get used to it.
"There's consequences -- especially on the big stage -- everyone's going hard, that's how it is."
With his PyeongChang campaign now over, Grimus said that he's looking forward to cheering on the remaining Australians who are yet to compete at the 2018 Winter Games, including teammate Sami-Kennedy Sim.
"We've got a really close knit group," he said.