CARACAS — In his frequent television appearances President Hugo Chavez is known for springing surprises. He has insulted world leaders, caught his defense minister unawares by ordering unexpected military maneuvers — he has even danced to hip-hop, rolling punches like a prize boxer. After a decade, it would seem that Chavez's unconventional manner would no longer have shock value. But in a recent live broadcast he still managed to astonish some of his countrymen when he christened the first Venezuela-made cellular phone the "Vergatario."