Harry Potter and the Goblet of Fire - Snape and Harry
In the scene where Snape and Harry are in the potions cupboard (after the 2nd task) Snape shows Harry a "Truth" potion that will make him spill his innermost secrets.
When Snape is holding the bottle his hands move from holding the bottle at the top, to holding the bottle in the middle.
Couldn't Snape have simply shifted his hold on the vial between the 2 shots? I know I've many times shifted how I was holding something, especially in situations where I'm waiving it in someone's face trying to make a point/intimidate them.