it depends u know when u blow out the smoke when theres wind and u see the cloud drifting to them then fo sho they smell it but if the smoke all seperates then i dought it. this reminds me of the time me and a homie hotboxed his single cab truck hella bad in the parking lot of burger king then whent through the drive through cuz we had the munchies so we order are food and are waiting a long ass time for some guy ahead of us so we blaze another one and roll up to tha window the ladys like can i take your or.... and simultaneously we roll down the window and the wind blows toward her and takes the big cloud of smoke right in the widow she must have been breathing in cuz shes all "coughf coughf" and u could see two little clouds come out hahahahahaha:smokin: