Hold a rigid body until ready to be acted upon?

Hi all, interesting problem I’ve come across. I’d like to be able to hold a rigid body (well, really, a series of rigid bodies) completely still until a certain frame, after which it should be subject to physics.

Here’s the difficulty: keying the ‘animated’ property inside the rigid body settings works, but completely breaks baking to keyframes.

Example: [unbaked physics] [oh god why]

Any ideas?