My neighbors park their late model luxury SUVs in their driveway.
On just about every departure, they enter their vehicle and then sit there for several minutes (usually three to four) before driving off. On return, they pull up and sit there for about the same amount of time-- maybe a little less. No loading/off-loading packages, etc., just sitting there.
I can't see inside as their windows are dark-tinted. And I don't want to get labeled as the neighborhood busy-body-- so I haven't asked them about it :-)
Ideas for what's going on?