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Typical velocity versus time of an MMP during a ping-pong at 0.8 mT. Successive data points were taken 0.1 s apart. Best fit line for acceleration gives an acceleration of 160 μm/s2 against the field and 40 μm/s2 along the field. The average outgoing excursion velocity is ∼170 μm/s. The upper left inset shows the suspended drop on a coverslip, supported by an o-ring.
