Escaping a zoo sanctuary multiple times and figuring out where it hurts the most to get stung.

Sources:

https://honesttopaws.com/ken-allen-escaping-orangutan/ (https://honesttopaws.com/ken-allen-escaping-orangutan/)

http://content.time.com/time/specials/packages/article/0,28804,2041628_2041646_2041609,00.html (http://content.time.com/time/specials/packages/article/0,28804,2041628_2041646_2041609,00.html)

https://en.wikipedia.org/wiki/Ken_Allen (https://en.wikipedia.org/wiki/Ken_Allen)

https://modernfarmer.com/2016/06/bee-studies/ (https://modernfarmer.com/2016/06/bee-studies/)