Body Dexterity Delay
Weaving Pickup is a Weave followed by a Pickup.
Demonstration of a Weaving Pickup.
Set the footbag high enough to give yourself time to Weave underneath it and prepare for the Pickup.
Set the footbag to the same side of your head. As it falls, Weave underneath its path and track the bag as it comes down.
Perform a quick downtime in-to-out dexterity to complete the trick.