During the shot where Anderson is simulating the 'figure of eight' to Jason, you can hear a faint heartbeat in the soundtrack, this was actually Bobby's heartbeat during the shot caught on his Lav mic. The Sound Designer thought it would work perfectly, so cleaned up the audio and made it part of the audio track. It works perfectly.
Anderson was shot over 2 days at a total of 15.5 hours, during this time there was a whopping total of 46 set-ups (shots). That equated to an average of 1 set-up every 20 minutes.
Over the entire shoot, there was only 1 lighting set-up. Due to the high shot count the crew decided to opt for just one lighting set-up which helped to maximise the time over the tight shoot.