I have had a few memorable reactions to the acceleration of a Turbo..
Had my boss in the car when I was joining a busy dual carriageway - spotted a gap in traffic from the top of the slip road, so planted it when he didn't expect me to, and almost snapped his neck.
Travelling back down the M4 towards London, and was in danger of getting boxed into the middle lane by a X5 beside me, so just accelerated and moved to the outside lane. I'd pulled into Reading services shortly after, and what turned out to be the driver of the X5 approached me in the car park. Turned out, he'd been admiring the car as he wanted one himself, and it made his day seeing it take off the way it did.
My sister-in-law, who passed away a couple of years ago, always used to insist on a passenger ride in my cars to see how fast they were - so when I had my previous Turbo, I took her and my nephew out for a quick drive. On a long straight piece of road (slightly damp), I slowed to about 5mph, made sure sports mode was on, and nailed it - the car squirmed a bit as it took off, and she screamed for about a mile, then practically fell out the car when we arrived back. It was one thought when I swapped to the Turbo S, that sadly, I wouldn't have the chance to do the same again..with launch control..