Personally I can't fault anything Gazza is saying. Even if it accelerated to, say, 72kph in 1 second that's only 20m/s (since there are 3600 secs in an hour, work it out) i.e. 2 x 10m/s per second, or in other words, 2 g !
So, you can see that launch accelerations are nothing compared to what...