The Blue Angels were here in Huntsville 2 weeks ago. A severe thunderstorm rolled right over the Airport. A microburst caused tents to collapse and 12 people were injured and a 5 year old little boy was killed when a generator that was being used to aircondition the tents fell on him and crushed him. It was very sad.
That video shows how dangerous those umbrellas can be if left on the beach unattended. Very scary.