I have seens sensors suddenly pop a real strange readign then return to normal as a semi passed me..
Theory.> Same frequency sensors (Likely same make and ESN there are only so many ESNs (Electronic serial number)
YOu may have been near another user of the same system.
I also put out between 0.030 watts (As I type) and 100 watts on assorted frequencies depending on which of my 2-way radios is live at the moment. Some of these can take out your TPMS I suspect... (Lack of proper selectivity in teh tpms with the power levels I use in that range (0.03 to 0.1 watt)