Discovered this earlier this morning. Performed on PS5, post patch, and seems fairly consistent. You just stop at the rock and make sure you "die" to falling and respawn at the rock. Should clip you through it and have you fall safely out of bounds. That is as far as I was able to venture, however. I tried experimenting a little but kept getting stuck between invisible walls here or there. But who knows? Perhaps the runners will find something useful out of my discovery. Anyway... Cheers!