Pulled out the cordless dyson to vacuum the bedroom and stairs to my office and Hesh was very upset, barking and lunging at the vacuum. I stopped and got my treat pouch and worked on building the positive association for him while I vacuumed. Came out of the bedroom with a full vacuum and a wagging dog. N, "wait, how did you get him to stop?" ... Then Hesh lay calmly at the top of the stairs while I vacuumed them. I tossed him treats periodically to reinforce that behavior.