John and Dave were hiking when they spotted a mountain lion staring at them. John froze in his tracks, but Dave sat down on a log, tore off his hiking boots, pulled a pair of running shoes from his backpack and hurriedly began to put them on.
"For crying out loud, you can't outrun a mountain lion!" John hissed.
"I don't have to," shrugged Dave. "I just have to outrun you."