Lisikhathi sasiqhubeka futhi izinhlamvu zokugcina zesihlabathi zazigobhoza kusuka ku-hourglass. Konke bekudaluliwe ezikhungweni zemithi. E-athanor, zonke izithako zaqoqelwa ukuhanjiswa.
Njengoba lezi zensimbi zishisa futhi ziguqulwa, ama-slags avele. Ngokungazelelwe, ukudumazeka kwe-harangue kusakazeka nge-ether.