+1

Clamp it back into the seatpost and straighten it out. Ask someone with more muscles than you or me, if necessary (I do that unashamedly, any time I realize my wimpy build is not enough for the task).

Hope you didn't get a concussion. Those tend to accumulate, and more than 3 or 4 in a lifetime can lead, with high likelihood, to an Alzheimer's-like dementia.