after living in Dallas for 27yrs and driving for over a decade, I've developed a lovely little technique I've named, "the drunk driver"
let's say you want to change lanes from the left lane to the middle lane because some lady in her volvo has decided that just because she's going 62 in a 60 that she's welcome to use the fast lane.
BUT, there's someone right there to your right... there's almost enough room, or maybe there's absoluetly no room... doesn't matter...
DO NOT engage the turn signal. if there IS a hole, that's a sure fire way to insure that the person will quickly speed up to block the hole just to be an ass.
what you do is lazily creep over till you're only a foot or less away from hitting them and then YANK the car back into your lane... the yank is KEY!! if you creep over but they think you're doing it on purpose, they'll generally stand their ground, but if you YANK your vehicle back (over correcting so that you almost go into the next lane or into the wall is a nice touch) they'll think, "damn, this dude is passing out drunk and is about to plow into me!!!"
it's amazing how quickly a hole opens up and you can continue along your merry way.
I've found that leaving your victim in a cloud of black smoke isn't quite as satisfying as eclipsing the sun for the original offender in the left lane.
As a credit to ladies in Volvos, more than a couple times, I've seen them actually move over a lane after passing, coasting for a moment to let the turbo spool down, and then flooring it and enveloping them in a warm cuddly cloud of black smoke.
cheers to you ladies... you're getting there!
Forrest