The sprinklers going off was definitely supposed to be similar to Jim’s proposal, but I don’t think Michael knew that would happen. Remember that he was basically trashing Jim’s proposal the whole time, “Oh you didn’t tell me that the weather was bad.”
I normally don’t care for the big sappy displays on sitcoms, but this one got to me. I loved the whole build up to it, and I was not expecting the line of employees at all. Did anyone catch all of Michael’s comments? The one’s I heard were
Oscar - “That would be a sham wedding.”
Angela - “That would be hot. I would pay to see that.”
Ryan - “He was the only one I was worried you would say yes to.”
It’s nice to finally see Michael get a happy ending.