When Spike was transformed into a ghost-like intangible state following the destruction of Sunnydale and the Hellmouth and his subsequent materialization at Wolfram & Hart, he was capable of walking through solid objects. He was initially unable to make contact with objects around him until he learned how to focus his abilities through desire, allowing him to make brief contact with people and things if he concentrated enough. This ability was relatively useless in a fight; he was unable to pick up a wooden bar to hit the demon Tezcatcatl in "The Cautionary Tale of Numero Cinco", and required a few moments to properly punch a cyborg strangling Gunn in "Lineage". Naturally, he lost these capabilities when he was recorporealized by Lindsey.