Some will self correct, the razor sharp/even burn line always nice, smoked my first Quesada Reserva Privada 4.75x52 size, when the burn line wavered it self corrected quickly,looked like a little pin point dot of fire circled around the cigar.A nice touch likely indicative of good construction, tho it could just as well been a little LSD like effect triggered in the smoker,did look nice.Might not have noticed if I'd not been concentrating on trying to pick up flavours .