You can connect with your Light guide and the spiritual dimensions in a way that is perfect for you. Oh, a poltergeist is human power. That is not any unearthly spirit. You humans can do many things you don't know of yet. Things you cannot control very well.
Poltergeist power is anger that has been locked up.
It is a strong power that's been stashed away and suppressed for a long time. The person with all those emotions locked away inside her never says a word about her feelings. Eventually she's no longer able to keep all this energy within. Then it all explodes, and the power is violently thrown all over the place. Physical things could be moved by that power from one place to another without being touched by a human hand.