From 0:04:30-0:05:30 UTC, a Ducati motorcycle could be heard pulling out from the beam tube enclosure section near the control room. As a reminder to all motorcyclists on site, according to the list of NOT Acceptable activities in T1500425, while we are in Observing there should be "no running motorcycle engines closer than the Staging Building."
Mine was in the garage all day....so wasn't me.
Mea culpa. Thx Travis, and good discrimination in L. Twin vs. Inline 4.