grab people off the sidelines and throw them smack dab in the middle of life’s dance floor

Hi,

What is the meaning of ‘grab people off the sidelines and throw them smack dab in the middle of life’s dance floor’?

Thank you very much

it’s not an idiom. the metaphor suggests that you not only seize the day and participate in life but also get the other walking dead to join you.

Thank you very much Shijinn.