It's a translation again

I really hope this comic works in english. I had some difficulties translating the sound that the chainsaw makes. The original sound was Rrrrreng deng deng deng but that assumes german pronunciation. I could have just replaced all the e's by a's so it would be Rrrrrang dang dang dang. The Onomatopoeia Dictionary (Yes, that exists) says it should be either wher, wher, wher, which I think is terrible, or brum-brum-brum-brum-brrrrrrrrrrrrrrrrrrrrr which was a bit too long. However, I just decided to shorten it on my own accord and went for it. Hopefully I did not accidentally change it into the sound a moped or, even worse, a motorboat makes.

Comic transcript

Panel 1:
Prof. E is lecturing a very strange formula that contains a skull and the number 666
E: After deriving this Formula using obscure transformations that were only possible because of confusing notation, we will now have a look at its practical applications...
Panel 2:
E is attacking G with a chainsaw
E: shouting The following decomposition is relevant for the exam!
G: screaming
Chainsaw: brum-brum-brum-brrrrrrrrrrr
Panel 3:
G wakes up inside their excellence box. It was all a dream.
G: Alcohol, splatter films and online lectures are not really a great combination before going to sleep...