1.I was just wondering how to trigger a certain cut seen, the one where..

I'm not sure if this was answered yet but I got the cut scene at like 2:00 in the after noon. That's when they ask you why you like Rock and that they want you to marry him. But Rock thinks they're talking about Marlin.

I proposed to rock with 4 hearts without that scene, and he didn't even mention the bird thing so now we're married...there is a walkthrough I think it's the second one that shows you how to get all the scenes...how many scenes have you had...you need at least two for him to say yes...his kid is the cutest one looks just like him so good choice with him...seriously check out that walkthrough...it has an index and everything

1. I tried every half an hour, and found that it tends to be at 12:00 - 2:00 in the morning. I got it at about 1:20. ;D

2. Nope. But I'd reccomend getting to at least 3 cut scenes before attempting to propose to him. But no, this cut scene isn't mandatory for you to marry him, though you might as well go ahead and get it.

3. Um... I just married him, so lesee. Just for future reference, Rock wakes up at 12:00 every day on the right room in the upper story of the inn. I used the cheat codes (heh) and go a wide variety of items Rock likes. If you DO use the cheats, give him Tomacco Salad and Veggie Burgers. If not, give him Toy Flowers. Just repeat that every day and sometimes several times each day. Later in the evening he goes to the bar, then usually out to where the sprites are or the tortoise pond. His first cut scene is triggered by walking by the inn while him and Lumina are out. The second is leaving your house in Summer at about 4:00 in the afternoon. The third is by leaving your farm in the Fall at around 11:00 - 12:00. The fourth is triggered by entering the inn at about 12:00 - 2:00 PM in either Fall or Winter.

Hope this helps! ;D