Believe it or not I think my Ball Python may do something similar. Occasionally I will notice a "twitch" on bottom underside of the neck about 6-7 down from the head. It usually happens when he is periscoping in his tank--trying to find a way out. It doesn't always happen but when it does, it freaks me out. Maybe they are involuntary muscle spasms. Such as your eye randomly twitching or what not.
My BP's do something similar on all parts of their body depending on where i touch them--they are trying to get my hand off them, usually saying "Don't touch me right now!" I wouldn't worry.
2.3 normal ball pythons
.1 ultramel motley het caramel corn snake
1. butter motley het caramel+stripe corn snake
1. fiance I had to rehome my kitty, and my dog got cancer and we put her down. RIP.(Did I forget anything??)
My BP's do something similar on all parts of their body depending on where i touch them--they are trying to get my hand off them, usually saying "Don't touch me right now!" I wouldn't worry.
When mine did it, I wasn't handling her at the time. She was moving into one of her hides right after she finished eating and her sides/belly started twitching like that.