1.) George O'Malley's death
I will be the first to admit that this episode made me ugly cry, and still does. When the elevator door opens and George is standing there in his Army uniform waiting for Izzy it breaks my heart. And when Meredith realizes he is writing 007 on her hand, I think we all sobbed at that point. O'Malley still is in my top 3 favorite characters and the fact that they killed him off so early on still makes me upset. He was going to join the Army and be a surgeon and save lives and they took that all away from him.
2.) Sloan's death
This was totally unexpected, throughout the whole episode they make you thankful that McDreamy survived the plane crash despite Lexi dying. Sloan should have lived, he deserved to get married to Lexi and raise Sophia and finally be happy.
3.) Lexi's death
Alright, this whole episode put me through too much turmoil and I cannot get myself to watch it again. Lexi deserved to be happy and they just took it all away, and the way Meredith cries afterwards is just the saddest thing ever
4.) When Denny died after proposing to Izzie
Just when you think everything is ok, it's not. Nothing is ok and the couple you were rooting for gets torn apart.
5.) And then he comes back because Izzie has a brain tumor
This had me questioning everything, like, is Denny back from the dead? No. Of course not. Izzie has a brain tumor, and Denny is the manifestation of it. As if our hearts weren't in enough pain.
6.) When Christina leaves 
I almost stopped watching Greys after this point, I was so mad that Christina was leaving and we would never get to see her again. She added so much to the show and made me want to have a friend as loyal as her. At least they danced it out.
7. McDreamy's death
This should probably be number 2. When this happened I sat in disbelief for like an hour just staring at my television. I was convinced it was a dream that Meredith was having, but nope. Nothing can ever go right in Shondaland
8.) When Derek and Mer finally get Zola
This is one of the few times I cried over something happy. of course there were weddings that made me cry but this always makes me sob because Derek is so happy that they get to rescue that cute little baby.
9.) The hospital shooting
I mean COME ON. This whole episode was an emotional roller coaster, I can't even break it all down. If you haven't watched it yet, go do that right now.
10.) When Jackson and April's son dies
I honestly couldnt believe that Jackson and April ended up together first of all and then to deal with the happiness of her announcing her pregnancy only to find out that the baby had a fatal illness was terrible to watch.
I'm obviously way too involved in this show, but there is no going back now.
