The famous medusa piece, and similar stuff in this link, are mind-blowing in creativity with a bit of comedy too. After going through countless museums in Italy this summer, and especially in Florence, seeing all the Madonna and baby paintings, or similar church frescoes became too boring. Like some of these are meme worthy in our modern age, to be created by someone centuries ago is astonishing.
Also, wow...he only lived till 39. Compared to many other contemporaries of his time like Bernini(?), or even before him like the (OG) Michelangelo.