Brent Lang Executive Editor Not much is funny about those terrifying early days of COVID, when the world was cloaked in an apocalyptic doom and the president was telling us to drink bleach. But in “Stress Positions,” Theda Hammel miraculously finds the funny side of lockdown, mining the masks, Purell and social distancing that defined that unhappy era for physical comedy. “Those gestures are like balloons, and they’re filled with the sense of danger and a sense of peril,” Hammel says of the Sundance-bound film that she directed and co-wrote.