The clots the embalmers are seeing are rubbery and long. Weird.
Those are “chicken fat clots” that can form post mortem. Here’s a PubMed paper whose 2007 date of publication spoils the fun of imagining it’s A Cause of Death from the Evil Clot Shot:
https://pubmed.ncbi.nlm.nih.gov/18243759/
“Medico-legal investigation of chicken fat clot in forensic cases: immunohistochemical and retrospective studies”