Berkeley sees machinima as "a strangely hybrid form, looking forwards and backwards, cutting edge and conservative at the same time". Machinima is a digital medium based on 3-D computer games, but most works have a linear narrative structure. Some, such as "Red vs. Blue" and "The Strangerhood", follow narrative conventions of television situational comedy. Nitsche agrees that pre-recorded ("reel") machinima tends to be linear and offers limited interactive storytelling; he sees more opportunities in machinima performed live and with audience interaction. In creating their improvisational comedy series "On the Campaign Trail with Larry & Lenny Lumberjack" and talk show "Tra5hTa1k with ILL Will", the ILL Clan blended real and virtual performance by creating the works on-stage and interacting with a live audience. In another combination of real and virtual worlds, Chris Burke's talk show "This Spartan Life" takes place in "Halo 2"s open multiplayer environment. There, others playing in earnest may attack the host or his interviewee. Although other virtual theatrical performances have taken place in chat rooms and multi-user dungeons, machinima adds "cinematic camera work". Previously, such virtual cinematic performances with live audience interaction were confined to research labs which had powerful computers. 