I, too, have used the garbage bag "swivel" to get into a vehicle. It works quite well, actually. However, my larger problem is actually getting in through the door. I have a long torso, so I have to really back in quite a bit and then twist around a bunch. The bag actually makes it easier. However, I don't always have one in my back pocket, so when going in another person's vehicle, I play  "Twister" to get in. Anyone else have the problem with a long torso and not able to bend enough to get in "normally"? 
Shalom,
Jeff
