"We have a developing problem with squirrels trying to get into the rubbish dumpsters. Earlier today one of our postgrads, whilst opening the cardboard recycling bin adjacent to the workshop, was scratched by a squirrel, apparently trapped in the bin.
So a few words of caution :
1. When approaching any of the outside dumpsters, advance and open the lid with care, mindful that a squirrel may be trapped inside, and may leap out as soon as the lid is opened fractionally;
2. Always leave the dumpster lids properly closed to prevent any animal entry"
Why did I only post it now? I was trying to find that picture. There's a lot of research involved in a PhD.