Frequently, the power of Spike's passions override his physical limitations. His pain tolerance, in particular, is exceptionally high due to his willingness to disregard physical discomfort in favor of his goals, interpersonal attachments, and general defiance of any limitation. Notably, when Glory tortures him to reveal the identity of the Key, he defies and insults her at every opportunity; privately, he later reveals in confidence that he would rather die than see Buffy hurt. In terms of his defiant nature, he often treats his vulnerability to the sun as simply an annoying inconvenience. He drives in broad daylight in vehicles with blacked-out windows (often listening to Punk Rock while he does so), and on several occasions travels outside during the day using only a blanket for cover.