Anyone know what would cause this phenomenon?

Me and some others were going through a bunch of photos from my birthday party the previous night and one pointed out to me that there was an 'orb' in one of them. Apparently these are believed to be the presence of a spirit, I just dismissed as a bit of light reflection when I first saw it but then I had a closer look and it indeed looked different. I've never seen something like this before, I'm wondering if someone with more knowledge of photography can explain what is actually being captured here

These are just a couple of images from google but they show the same thing that was in my photo.
I'm assuming it's still some type of reflection from light.

Apple OC said:

show your photo

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When I get it I will, it was taken on my friend's camera.

Mr_Brightside_@ said:

It's just a reflection
Did you use flash?

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I thought it would be, I'd just never seen anything like it.
I didn't take the photo, but yes, flash was most likely used.

G.T. said:

I think its usually dust caught by the flash

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Ahhh, As soon as I started putting the word dust into my searches it started bringing up completely different results. Seems like it was just a bit of dust. Thanks G.T.

Interesting how it gives it an almost 'ball of energy' look to it instead of the usually quite uniform reflections I usually see.