Designing for interactive performances is challenging both in terms of technology design, and of understanding the interplay between technology, narration, and audience interactions. Bio-sensors and bodily tracking technologies afford new ways for artists to engage with audiences, and for audiences to become part of the artwork. Their deployment raises a number of issues for designers of interactive performances. This paper explores such issues by presenting five design ideas for interactive performance afforded by bio-sensing and bodily tracking (i.e. Microsoft Kinect) developed during two design workshops. We use these ideas, and the related scenarios to discuss three emerging issues namely: temporality of input, autonomy and control, and visibility of input in relation to the deployment of bio-sensors and bodily tracking technologies in the context of interactive performances.