I was in the middle of a science experiment when I realized I was in Leo Nguyen’s body. I’d been paired with him for our final project, and we were supposed to be testing the effects of different substances on plant growth. But then he’d accidentally knocked over a beaker of some weird-smelling liquid, and the next thing I knew, we were both lying on the floor, staring up at the ceiling. I blinked a few times, trying to clear my vision. "What just happened?" Leo asked.