When Lorelai is at Luke's and she turns around to see Taylor, the handle on her mug changes position. Just after that, her handbag suddenly disappears.
At 7:07, when Rory asks Lorelai to call Emily to get her out of Friday Night Dinner so she can celebrate her and Dean's 3-month anniversary, a boom mic drops into the shot as Lorelai stands to get the phone.
The boom mike is visible at about the 8 minute mark, when the girls are in the kitchen.