https://www.redbubble.com/people/binarygod/works/26091091-a-disused-yeti?asc=u&p=ipad-case&rel=carousel
https://www.teepublic.com/t-shirt/1465408-a-disused-yeti?store_id=10462
Basically, the Second Doctor's phone tag joke. More Doctor: https://www.artstation.com/artwork/KG29y