One morning he rushed into the office early and placed a crane on her keyboard. He then slyly sat at his desk, silently pretending to work when she arrived with her cup of Tully's coffee to be met by a little paper bird staring up longingly from her computer. At first Crystal put the crane to the side, smiling at it and moving on with her day. Then she received another the next day. And another the day after that, until finally she grew upset at Jack's relentless passes, especially given that she had a boyfriend.
"You don't need to get me juice," she said to Jack as she stormed over to his desk, reminding him that she was in a relationship. "And it's really sweet that you're putting the cranes on my keyboard, but you can stop now."
"Did you see which letter I put them on?" Jack said excitedly, almost ignoring her request to respect her boundaries. She had not seen that the cranes had each been placed on different letters, which were going to spell out her name. "No!" she said, annoyed, and turned around to leave. But he pressed on, determined that something would eventually happen with Crystal.
spoiler alert: she would end up dating early employee Jason Goldblum, although they did manage to remain friends, amazingly enough (but I very much empathise)