That's the question after a recent accident left one of Sam Cohen's tenants paralyzed from the waist down. Cohen, a former scientist at Lawrence Berkeley Laboratory and founder of the company Energy Solutions, owns a rental Victorian on 11th Avenue. On July 21, reports the Tribune, tenant Andrew Pumphrey was standing on a landing, holding his two-year-old niece, when the landing fell apart, and the two plunged 25 feet to the concrete below. Pumphrey is expected to regain the use of his arms, but anything below the waist is a crapshoot; the niece was unharmed but horribly traumatized. According to the Trib, Cohen told tenants that the staircase was "more rickety than he would like," and promised to fix it, but never did. Energy Solutions improves the energy efficiency of buildings and office complexes; its clients include Pacific Gas and Electric, the city of Oakland, and Lawrence Berkeley Lab.