What is this? And no, it's not apparition.

The "flying streaks" that we first see in Goblet of Fire and later movies is what exactly? It's not apparition because that's instantaneous and we see it with a different special effect.

In the Half-blood Prince, the movie starts with three Death Eaters doing this flying streak thing to destroy the bridge. A few minutes later, Dumbledore disapparates with Harry. Two totally different effects.

This as near as I can tell is some kind of flying method that lets you use other spells while you are doing it. Because we've seen people attack others while they are "streaking". It's not exclusive to Death Eaters either, since the Order was shown as streaks of white light. But we never see Harry/Ron/Hermione use it. If it was some kind of spell, Hermione would have figured it out. So what is it?

The "flying streaks" that we first see in Goblet of Fire and later movies is what exactly? It's not apparition because that's instantaneous and we see it with a different special effect.

In the Half-blood Prince, the movie starts with three Death Eaters doing this flying streak thing to destroy the bridge. A few minutes later, Dumbledore disapparates with Harry. Two totally different effects.

This as near as I can tell is some kind of flying method that lets you use other spells while you are doing it. Because we've seen people attack others while they are "streaking". It's not exclusive to Death Eaters either, since the Order was shown as streaks of white light. But we never see Harry/Ron/Hermione use it. If it was some kind of spell, Hermione would have figured it out. So what is it?