Ive only seen 1 person in 3 years of AH really do a snap roll. Way back in July of 01 I was a noob. I was flying my 109 odve in from high on Helm's ki-61 opened up at d600, he snap roll perfectlyout of my way, he did it again on the next pass, But by this time StSanta came in in a 109 as well, I went low, Helm's SA failed him as he Snap-rolled again on StSanta's pass, I came in low 6 and nailed him.
Though against anything armed with hispanos,.50s,or niki spray guns the snap is suicide