Imagine watching your favorite TV show and suddenly, the screen goes black. That's exactly what happened to viewers watching the World Snooker Championship semi-final live on the BBC. A power outage at the Crucible Theatre in Sheffield caused a 12-minute disruption to the broadcast, forcing the BBC to switch to a rerun of Wild Isles.

The power outage occurred during the second semi-final between Mark Allen and Wu Yize on Thursday night. Allen was in the middle of a frame when the lights went out and the cameras stopped filming. The interruption was a real surprise to everyone, including the players and officials inside the arena.

Hazel Irvine, the presenter, immediately apologized for the interruption and explained what had happened. She said that a big crash had caused the power to go out, but Mark Allen didn't miss a beat. He took the opportunity to amass a break of 91, which helped him to stay focused and composed.

Steve Davis, a six-time world champion and pundit, was also in the arena and described the scene when the power went out. He said that it was clear that something had happened when the screens went blank and the lights went off. There was confusion among the players, officials, and others inside the arena, but Mark Allen was able to keep his composure and carry on playing.

The semi-final remained tightly balanced despite the interruption, with Mark Allen recovering strongly after the restart. He compiled a break of 76 in the fourth frame to draw level with Wu Yize. The contest is one of two last-four ties at this year's championship, with Shaun Murphy facing John Higgins in the other semi-final.

The final will take place across May 3 and May 4 at the Crucible, and it's set to be an exciting conclusion to the tournament. The semi-finals, played over a best-of-33 frames format, remained finely poised, with both ties still open heading into the concluding sessions on May 2.

The power outage was a real surprise to everyone, but it's clear that Mark Allen was able to stay focused and composed under pressure. His ability to keep his cool in the face of adversity will be crucial as he looks to progress to the final of the World Snooker Championship.

The World Snooker Championship is one of the most prestigious tournaments in the sport, and it's a testament to the players' skills and determination that they're able to perform at such a high level under pressure. Mark Allen and Wu Yize will be looking to give it their all in the semi-finals, and it's sure to be an exciting conclusion to the tournament.