Ya'll like pictures? Here are some I stole from Holley's site.
I like the one below. You can tell I'm accelerating based on the body position compared to the static position on the next photo.
It helped greatly having my "crew chief" in the car with me. He was providing feedback on whether or not it was a good run simply based on seat of the pants feel. (He never even saw an autocross in person prior. On my fastest pass he kept saying this is a good one, hold on to it, hold on. He was right.