Throws me off a lot. It is really distracting.

What exactly is it? The icon in white is moving fast, but I suspect it's a Sticky Bomb? Correct me if I am wrong.

Yeah it's a sticky marker. Case closed.

You are correct, it is a sticky bomb. You will have to:
Wait for it to explde and get further away from the team mates so you don't hurt them
Or, find a team mate to help you get it off

You can not get it off yourself as it would lose its purpose

How exactly does one remove the sticky bomb?

Like, does a certain class have to remove it from you? Or you can just interact with the person and remove it that way with any?

The engineer (I believe) can take it off you...
That or any class can just pick it off :icecream:

Any class.

Thank you for the correction

:flamethrower:

Yep,sticky bomb,just face to face and press "F" to remove it from teammate for PC users.

I learn it by luck

X on Xbox, square on PS3 (assuming default controls)