I wouldnt think of tantrums until 2 years old. Once they start getting up and getting around they've got to learn the word No for their own safety - but crap. What can you do to a 1 year old?
i have no idea though. i dont have any. I would think you would get numb to that because so many people think they have the right to tell you what you should do. i have that already from my MIL and i dont even have kids yet. lol
I wouldn't say it was a tantrum either. My son is 2 years old, and he definetly throws the occasional tantrum. At 1 year old though, I would say he just got scared when you left the room.
My son would do that when he was that age...its too be expected though when his first year of his life he spent it mostly with mom and dad and grandparents.