On July 30, Alissa Haslam was called out of meetings at her job with the Seattle-based Washington Bus to take note of a "disturbance" on the street. What she saw when she approached the window was her partner, standing atop a Washington Bus, holding sweet, loving signs, blasting the Lumineers' "Ho Hey," and receiving live musical backup from Tubaluba. 

As Alissa realizes that she's being proposed to, she begins to cry, laugh, and gasp as Jeanne executes a flawless, heartfelt proposal. 

When posting the video to her YouTube account, Haslam notes that "just the night before, we were talking about romance and I pretty much told her she wasn't romantic. I am eating crow… and will be for a long time." 

Watch the entire heartwarming proposal below.