Yarp. I did that once on the beach, rode one way at low tide on full pressure and then dumped heaps to come back at high tide. Pretty much had nuffink in the rear and killed the tyre.4psi was that the fat bike? How could you tell you had a flat? ha ha. I use to pump up to 10psi on the fatty then just let air out until it was soaking up the bumps and no longer bouncing me off the bike. Never know how low I got.
Lso. Wot ozzy sayeth.