My idea was that each human brain constructs its own memory of what happened between jumps - and these can differ wildly, as if each person saw a different possible world. All the laws of physics and conservation laws held only as rough averages over possible paths between jumps, but that the brain ignores this - so if time jumps from traffic to two cars crashed, then 50 different people might remember 47 different crashes, with 3 not remembering "seeing" a crash at all - and the actual physical state of the cars afterward won't be the same as any of them. It could even end up with car A crashed into car B, but car B didn't crash at all - violating assorted conservation laws.