I wouldn't drive like that unless I really thought I could. I've driven pretty damn high before (as in, to the point where I shouldn't have) But luckily those were late at night, when all I had to do was go across town. And even then, I managed alright. Mind you, if I ever had to do serious driving, as in, with other traffic, I'd never get that high. I know my limits when it comes to driving and functioning, because I've occasionally (in safer conditions) gone past them... I've been lucky enough that I could still make it home on those bad nights, so anything not as bad as those is good in my books.