We don't really want to see an elephant explode, unless it's in colorful and fictional graphics from Kurzgesagt. In other words, we will only look at how it's theoretically possible. This video explains the difference between how a small animal, such as a hummingbird, and a large animal, such as an elephant, deal with the physics of life. Animals of different sizes have to balance energy, metabolism, and heat transference in a way that's optimal for their size. You can't just take a certain species and change its size without changing its design as well, despite movies like Attack of the 50 Foot Woman or Honey, I Shrunk the Kids.
We also hear the narrator say the word Kurzgesagt, or at least I think that's what he said. It's not pronounced anything like the way it looks to an English speaker.