Yeah, the eyelid thing is the same. No one *makes* your eyelids stick, or your right foot, you must accept the suggestion and *agree* to follow the instruction.
You and your friends didn't *agree* to follow Derren's instructions, but there were plenty of people who were willing, I'm sure. And he is the master of rapport and authority! I'm pretty sure I would comply with anything he suggested, just because he's got me such great rapport with him.
How about when he got the cashier at the races to pay out on a losing ticket? I loved that one.
I think to get a pregnant woman to trust you enough to accept your suggestions is a masterful thing, too. I really acknowledge you for taking that on -- what a huge difference you make in the world!