A romantic prankster almost suffocated when he mailed himself to his girlfriend in a sealed box - and got lost in the post.Hu Seng, from Chongqing city, southern China, paid a courier firm to deliver him to partner Li Wang as a joke.But couriers mixed up the address and instead of 30 minutes in the sealed box, gasping Seng was trapped for nearly three hours.By the time the package finally arrived at his girlfriend's office, where a friend was waiting to record her surprise on camera, Seng had passed out and had to be revived by paramedics."I didn't realise it would take so long," admitted Seng. " I tried to make a hole in the cardboard but it was too thick and I didn't want to spoil the surprise by shouting."A spokesman for the courier commented: "If he'd told us what he was doing at the start we would not have taken the parcel."Even when we accept animals they have to go in special containers so they can breath."