I know captions for images and quotes are in present tense, but I see captions sometimes being phrased with "ing" and sometimes with "s".
Example: 'The Once-Ler showing his true nature'
VS
'Shredder's last words before he forces Kavaxas and himself through a portal back to the Netherworld.'
Notice the different way the verbs are phrased? Which phrasing is correct? Are both equally good, or is one more customary?