Anyone's bird do this?

[Nelsbels]

The other day I had Gabby out and I was sitting at my computer when I clicked on a music video. Gabby was on my lap playing with some toys and all of a sudden she went into an attack mode, running at my hand with her mouth open, eyes pinning like crazy. I threw a hand towel over her head while I turned off the music and in a few minutes she calmed down.
Then...... today, she is again sitting with me happily shredding a carrot and getting scritches when two rooms away my husband starts vacuuming. All of a sudden Gabby goes nuts again. Thankfully my husband happened to turn off the vaccum and I yelled to him not to turn it on again till I got Gabby into her cage which I did with a perch as she was still lunging for me.
She has never reacted to noise before like this, she is about 4 1/2 months old and never maliciously bites me. She has not had a bad experiences with the vacuum or the radio for that matter either.
Has anyone else's bird reacted like this before?

[The Outlaw]

One of the problems with our pet birds is that they often bond with us. In the wild, when something potentially dangerous comes near a pair, the male will often chase the female away to a safer spot. Since you are so much larger and he couldn't defend you, he is trying to make you move away from the danger. They are complicated little pets.

[Valo's Moirana]

Originally Posted by Nelsbels

.. and all of a sudden she went into an attack mode, running at my hand with her mouth open, eyes pinning like crazy.

this sounds awfully like a description of Valo when he attacked one of my friends without any obvious reasons. i inquired in the conure forum about possible reasons, and i got convinced that it originates from the urge to protect (trust the outlaw )

[Nelsbels]

Thank you for your replies, they make sense. I just hope she doesn't feel the need to protect me too often especially if she actually bites me.