While filming the 1963 episode "Lucy and Viv Put In A Shower", in which the leading ladies attempted to install a shower stall (but become trapped inside, unable to shut the water off), Ball nearly drowned while performing in the tank of water. She was unable to bring herself back to the surface, and it was Vance who realized there was a problem and pulled her co-star to safety; Vance went on to ad lib until Ball could catch her breath to resume speaking her lines (all the while, cameras continued to film). Neither the film crew nor the live studio audience realized there was a problem.