A good vid showing low-pressure voticies

[Billzilla]

Pretty cool. Note how the ones coming off the ends of the flaps stop as soon as the landing gear takes the weight of the plane.

 

[Jazzy]

Absolutely wonderful. All vortices have low-pressure centers, so "low-pressure" is redundant.

 

[GregMc]

Nice Juan

Was looking at some similar ones today: