Folks with no situational awareness, who stand in front of something usually pondering while no one else can access whatever.
Folks who wait to collect their stuff on a plane debarking and then block the aisle while they slowly try and get seven coats and bags and rollers from the overhead.
Screaming babies on a long plane flight.
Folks walking ahead of you who suddenly stop to pull out their phone.
Folks in some meeting whose phone rings and they are slow to tend to the ringing.
Folks who appaud prematurely at a sympony after a movement not the finale.
Kids.