Residents of Karachi, Pakistan's largest city, watched as cattle were lowered by crane from the top of a four-storey home ahead of the Qurban Bayram or Eid al-Adha in Arabic.

Unlike other Muslims who buy animals for sacrifice a few days before the Qurban Bayram, Syed Ejaz Ahmad, 55, said raising his own calves was more economical.

Ahmad started raising calves in a rooftop shed about 15 years ago. As they grew in size, it became difficult to lead oxen down the narrow staircase of his house.

His solution? Call a crane service.

The operation has become an annual event in Ahmad's neighborhood of Nazimabad, where a crowd cheered as it watched the spectacle unfold.

"I was a bit scared when I did this for the first time," crane operator Mohammad Hanif said this week as he swung Ahmad's seven cows and oxen to the ground.

"When the animal's feet struggled, I thought it might break the straps and fall on the crowd of people, particularly children," he said. "Now I have a lot of practice doing it."

Qurban Bayram is one of the two most important festivals of the Islamic calendar and commemorates the willingness of Ibrahim, or Abraham, to sacrifice his son on God's command.

Muslims mark the holiday by sacrificing animals such as sheep and goats and sharing the meat with family and friends, as well as donating it to the poor.