Yakir Aharonov, Sandu Popescu and I have written a new paper where we show how Angular Momentum, a conserved quantity, can travel from one place to another across a region of space which is empty except for a vanishingly small probability of containing a particle. Remarkably, this probability, which can be made as small as we like, allows the angular momentum to flow, apparently without any carrier. This is an advance in the interaction free research field, which began with Elitzur and Vaidman’s interaction free measurement.