The Israeli soldier probably stepped on one of the many cluster bombs the Israeli Air Force dropped on Lebanese villages during the 2006 war. The soldier was sneaking under the cover of darkness to lay a monitoring device (camera embedded in a rock look-alike). What goes around ultimately comes around to hit you in the face!
Saudi-led planes hit Houthi-controlled government buildings (Reuters)
from the article: Four IDF soldiers hurt in explosion on Israel-Lebanon border