Ballistics between sessions

Dropped in to a series of technical sessions being held in the Santa Clara Auditorium today. There was a longish lunch period and Adam, Eric, and Andrei passed the time launching water bottle lids between ever higher goal posts. Here’s a cameraphone shot from an early phase

although the posts ended up a little over a foot high, once an additional steel water flask was repurposed from a nearby table.

Tie knot: Bow (with a bow tie).