Find my full series under the HELP I WUVS HIM tag or at the why I love Dhawan Master tag.
H/T to @themastergifs for the first gif.
Look at him FROLICKING in The Power of the Doctor when UNIT is imprisoning him! There's a skip in his step!
This hearkens back to similar moments in Spyfall and Ascension of the Cybermen/The Timeless Children where he cuts the rug out of sheer joy [#3: His nerdy dancing!]. In fact, it reminds me the most of the moment in Spyfall II when he jumps around and claps his hands during his Dramatic Reveal TM:
Same uncontainable, irrepressible, playful enthusiasm! It's a pity he has so few of these moments...