The noise- part of the transitional stage of WILDing. Sometimes they can be soothing, calm noises, or sometimes even scary ones, like screeching of tearing metal. They are often paired with hypnagogic imagery. Sometimes they last seconds, minutes or hours, or never appear at all.
WILD is my favourite, but an easier one is supposed to be DILD, but that requires much more diligence with setting up dream signs and doing RCs.
Creating objects- If you turn round a corner, you have to 'expect' them to be there. Or opening a door, you have to expect your desired location to be there. You have to believe it's possible, or it wont be there. Sometimes, I fly up and then close my eyes as I land, and I'm somewhere else.
No, you aren't the only one to get scary experiences. Sometimes people get painful FAs, or get stuck in a chain of FAs. You just have to remind yourself that you're asleep and can't get hurt.