 Skaði is described as having taken a venomous snake and fastening it above the bound Loki, so that the venom may drip on to Loki's face.Loki's wife Sigyn sat by his side and caught the venom in a bowl.But when the bowl becomes full, she must leave to empty it, and then Loki is burned by the acidic liquid and he writhes in extreme pain, causing the earth to shake and resulting in what we know as an earthquake.