Ten minutes into her Benihana "Power Lunch," BI’s Sophie Kleeman witnessed her first onion volcano, and said she felt a joy she’d rarely felt since she was a small child. Launched last month, the lunch deal comes with a guarantee — in and out in 45 minutes for less than twenty bucks or your meal is free. One might expect commensurate constraints on the creative freedom of the chef. But Benihana, which opened in 1964 and has around 100 locations or offshoots nationwide, appears to have remembered that its customers come for the show just as much as the food. Kleeman was a Benihana newbie, and she had been briefed on what might happen. Still, she was overcome with delight when the mushroom-shaped flame shot up toward the exhaust fan. Her mind was a million miles away from the pile of work waiting for her at the office. It was settled: The lunch deal was a hit. Click the link in our bio to read more about the experience. Story by Sophie Kleeman (Credit: Kate Taylor/Business Insider)...