It's possible in the same way its possible that you will spontaneously phase through the floor due to a particular outcome of atomic resonance. Possible, but so unlikely it almost certainly has not, nor ever will happen.
Might something a small as a grain of sand have phased through a solid barrier as thin as a piece of paper somewhere on earth, at some point over billions of years? Sure. Paper is still pretty thick, and a grain of sand is enormous on the atomic scale, but it's at least in the realm of practical probability. When you start talking about cum(P) events in the realm of 1/1e30 you simply can't produce a scenario with that many dice rolls. If our population was 8 quadrillion and spanned a 40,000 year empire we would likely still never see an individual 11σ from the mean.
Might something a small as a grain of sand have phased through a solid barrier as thin as a piece of paper somewhere on earth, at some point over billions of years? Sure. Paper is still pretty thick, and a grain of sand is enormous on the atomic scale, but it's at least in the realm of practical probability. When you start talking about cum(P) events in the realm of 1/1e30 you simply can't produce a scenario with that many dice rolls. If our population was 8 quadrillion and spanned a 40,000 year empire we would likely still never see an individual 11σ from the mean.