Translation of libremente

for a minute I blamed the burger that I had eaten at the duty free back in Cancun, but thinking a little further I recalled eating street food the night earlier, as it was Mexican independence day.
Seldom only do such incidents occur, thank God, but the fact is that these incidents, which are started by a relatively small group, need to have a broader support among others in order to exist.
We arrived without any more power back in the village of Sapa and went for dinner right away. We went to bed early, because of the physical exercise and because we did not sleep well a night earlier.