In the past, I've talked about "How does the Transformation look to an outsider" in this blog-post.
Now let's take a look at how the comic by MVCreations handled it.
In Volume 2 (also known as "Dark Reflections") Issue #3 Stratos alerts King Randor that Avion is being affected by Mysterious Forces. Prince Adam volunteers to go and help but Randor asks him to locate He-Man instead.
So Prince Adam steps outside and we see that Teela is out on the balcony, when there appears lightning coming from between buildings and a crackling sound. Also note that while in the animated series the lightning was seen blue, here it is yellow.
Teela doesn't go and investivate the matter any further but steps inside.
The Transformation-sequence is a pivotal matter for most fans of He-Man and the Masters of the Universe and whenever creators/producers try and view it from new and interesting angles, it helps flesh out this event.
The 2013 "He-Man and the Masters of the Universe" comic by DC Comics Ongoing Series also addressed the matter of Transformation-sequence in their 1st issue but that is a different blog-post for a different time...