Took a turn today and had a horendous noise/grind in the right front.

Removed the wheel and dust cover...the outer Snap ring had come off the end of the Axle (it was floating around in the cap) and the axle was walking out of the hub. This could have been bad...very bad.
I replaced the ring and good ta go!
Anyone have this "incident" before? I don't know if the last person in there hadn't seated the ring correctly or what. Scary stuff.