Returning In Lindas Dream....?

That bit really freaked me out. Like the bit where he goes into the guys head who is having sex with Linda right after Oscar dies. So did Oscar decide to see how Linda was feeling while she slept later, and witness her dream about him coming back to life. Or was he trying to send her a message that he's still out in the ether so to speak? I think the troubling thing for me is when she said 'I had that dream again...' So was this a nightly project of Oscars the viewer only sees once of? Or is Linda honestly wishing he would and wouldn't come back to her. Certainly makes me think of family and loved ones that have died in my lifetime. And there's a lot of distrust and hate if they surface in my dreams while I'm living my life today. Yet, when I wake - I really miss them, and feel guilty for the anger I had towards them in my dream. My own self induced psychoanalysis, or a desperate message from beyond? Or both? That scene has me perplexed!