well, sounds healthy!

It happened with my first, but the sonographer had me drink like 2L of water to "crowd" the fetus and force him into position. It worked, but I was about 10 seconds from peeing right there on the table.

I agree with the other "bright siders", your peanut being active is a good thing. I've heard that fetuses with chromosomal abnormalities are not as active as healthy ones.

Suggestion: could you call back and reschedule for an early morning appointment? Since our peanuts tend to be "nocturnal", s/he should be less active once you get up in the morning and start moving around.