My best stories about leaking packages/opens comes from my days as a responder. Box full (16x16) of gay porn DVD's. Crate of bees. A corrosive poison leaker that shut down half the hub because of the strength of the smell. Fox urine (that smell!). Cracked 5 gallon bucket of manure.
Worst PC leaker was actually a box of toner (new) that spilled out magenta EVERYWHERE! That was awful.
Another driver called me asking about a bad leaker he had (because he knew of my rewrap days) and if it was severe or not. I asked him and when he described how strong it was and the discoloration of the boxes under it, I told him to call it in and wait somewhere away from the truck for someone to clean it up. He was down for 3 hours and the hazmat team pulled 30 boxes. Lucky it was summer so he could drive with the front doors open for fresh air because it leaked toward the front and smelled the rest of the day.