Maybe it just smelled like a cigar to you. Maybe someone was smoking a cigar near you.

Maybe it was a powerful fruity weed with some tobacco mixed in so it'll last longer.

Cigars are wrapped in tobacco leaves. Blunt wraps are made from tobacco. Cigars usually have a lot less chemicals on average (good cigars, not gas station cigars) than cigarettes.

They may have used a chillum. Was it a one-hitter? A one-hitter that's small "can" make almost no smell.

No offense, but why do you wanna know so bad?