Josh Duhamel screamed when he saw a snake - but was embarrassed to discover it was actually a lizard. The actor was jogging in the Santa Monica Mountains with his wife Fergie when he caught sight of the slithery critter. He let out a high-pitch wail and immediately stopped dead, causing Fergie to inch forward and inspect the creature. "She went to look and the calmly pointed out it was only a lizard," a source giggled. "Josh turned bright red with embarrassment." The couple pressed on with their exercise routine, with a mortified Josh refusing to answer as Fergie teased him about his mistake.