okay so my veiled cham murph would always hiss at me and lunge at me when i put my hands in his cage. I never free range his food I hold a cup and he would eat from it. but about a week ago I held ONE cricket in my hand and he saw and ate it. and about 4 days ago I noticed everytime its feeding time he'd see my and and run to the front door of his cage and tried his head at my hand even though I had nothing there (his food is in a cup) and i thinks its pretty cute so after he ate i put my hand in his cage and yea he got a little dark but he didnt his and I put my hand under him and picked him up with no hissing.
I thought it was pretty cool.