This is a meaningless request as they just want to see if people are serious about going to BU, not that they really care what you are saying, but more if you show the proper amount of coerced enthusiasm expected of a semi-indentured servant.
Here is how I would respond:
Dear BU,
Thank you very much for the opportunity to further allow me to talk about myself (something I love to do). I hope to be able to share my life experiences running the first McDonald's at the North Pole and dealing with a lifelong struggle with an innate (I believe) desire to verbally abuse monkeys at the zoo. . . I believe I suffer from a rare form of Zoologically Initiated Profanity Syndrome (ZIPS), which my psychiatrist disagrees with though saying I am simply "ill tempered" when around monkeys, and have emotional baggage having been partly raised by some in the wild.
I know ZIPS exists! (Despite the fact that the internet says it doesn't, can you believe?)
Despite being diagnosed with ZIPS, I was able to gain public health experience by conducting a personally double blinded stealth research study by determining if it is possible to survive in an enclosed space for a prolonged period of time by using a portable air conditioning condenser to "recycle" my own bodily waste products. My friends said that I shouldn't have lived in a cave for one week eating my own, . . . well you know what.
But the knowledge I learned in that cave soaked with bat feces is truly priceless as it will help me digest what is being taught at your school.
I like how you were nasty to the Peace Corps volunteer who spent a whole day dutifully trying to get a form to you, you put her in her place, your school sure is . . . different.
As a practicing member of the Southeastern Orthodoxian Church of Scientology, I hope to able to bring the science and art of public health to the indigenous populations of Venus and Mars. Although by law I am unable to get within 100 yards of the monkey enclosure at the Franklin Zoo, (in addition to several ex-boyfriends), I look forward to basking in the warm glow of learnin' with your faculty and students at BU.
Although I am not prepared to worship BU as a true deity
yet, and offer lifelong loyalty despite what may come, I am not adverse to animal sacrifices if done in a thoughtful manner.
May my acceptance unfold as in accordance with the prophecy and thank you for the crazy email asking me to pledge allegiance to your demented school.