delorean used in back to the future

Mausoleum smells are from the decomposition process, which occurs naturally as the body undergoes the decaying process. Morticians frequently call the offending bodies, "leakers". These mausoleum odors can be terribly overwhelming, and for that reason in the embalming chemicals and also the gases coming due to decomposition, they're able to along with that pose a health hazard to workers and visitors.