I can see a nude woman in the left one, but maybe that's something for Mr Freud to worry about...
The left one is the randomly generated pattern. Note that, just because the plotted events are sometimes 'clumped' and sometimes 'sparse', it does not follow that the events are not random. What we need to hope is that there is sufficient collective expertise in the airlines, type certifying NAAs, ATSB and CASA to spot when the random events becomes non-random.