The official advice given should your overtake speed on contact be too high for the HDU to take up the slack was to sit there and take what was coming. As the probe tip has a sideways shear force of about 1000lbs, this invariably meant leaving it stuck in the basket! There were few structural flight safety implications, but the fuel hoovering out of the now open basket mushroom valve meant that your in flight visibilty was somewhat impaired. Not such a good thing considering how close you were to another aircraft!
I saw it happen twice, but not as a result of my handling I'm pleased to say.