Pull belt down with left hand, pass it to right hand, then buckle.
It's not a one-handed operation for a 3-point belt....that's for the lap belts, they need to rewrite that.
Holy crap I can't freaking believe they soil their pants over how we buckle our seatbelt!!
I can fasten my belt going hand to hand faster and safer to my rotator cuff then trying with one hand.
Show me when that one-handed method was written, anyone with an issue take it up with your safety comittee.
If you tear your rotator doing this then maybe they will get a clue.