Beware

A forgotten sack of potatoes is probably one of the easiest ways you could accidentally kill someone (or yourself).

If you were to leave a sack of potatoes in a room with no ventilation, they'll eventually begin to rot and release a toxic gas (to be precise; solanine). With a bit of build up the next person who opens that door and enters, will guaranteed die.

Potatoes are often stored in cellars due to being able to preserve them longer by avoiding sunlight. This has consequently lead to quite a few deaths.

For anyone who isn't aware, potatoes are a part of the nightshade family. (The name that often appears in cinema due to the very deadly nightshade berries)

In conclusion, throw away rotting food as soon as possible...