Tranny explosion

The way I was showed (right or wrong) by S.Hauser who ran the ex Rossi Challenger here was, 1st gear, lay into the throttle and shift 2nd>3rd almost instantly, my revs would settle at 5000, let the smoke develop and roll out....727 std.pattern MVB. 530hp 440, 4.88's 14x32's, 4800 stall 8". Did 1st gear starts with the 340 car 727MVB, 10x28's 4.30's 4200stall only 370hp, shift to 2nd same way. Never an issue...perhaps I was lucky?...total of 10yrs racing with both.