I had a similar occurrence with an Aprilia in the early 1960s when the prop shaft escaped. There was a loud noise, a lack of drive and brakes as it tore through the hydraulic line to the rear, then it all ended rather abruptly as it wrapped round the hand brake cable and brought the car to an immediate stop with the rear wheels locked. It caused havoc on Feltham bridge in the rush hour!
We enjoyed the SPR very much, but we were taken home by the RAC on Monday, as the water pump had failed, cracking the cylinder head (slightly). That's the third recovery this year! What else can possibly go wrong?
Regards, John