At the mouthful of oil thing. I can cough, sneeze and even remove foreign objects without spilling a drop. I have even developed an oil pulling language which my sons have now begun to decipher quite well (although pretty much like the way you'd talk to Lassie: "What's that boy? You say there's a fire at the Old Mill house?")
The coup de grâce for me is I have learned (although do not necessarily recommend) how to do my weird breathing exercises entirely through the nose while pulling. Only used in a pinch when I am in an either/or situation before work, and kind of gross at that - but coupled with light weights it lends a real interesting pull.
I am still too chicken to pull in the car like Trapper. I keep picturing getting pulled over and trying my Lassie language on a cop.