After Ezra and Kana cut a hole in the ceiling with their lightsabers, Zeb crawls through, placing his hand on the still-glowing hot metal with no ill effects or even a reaction. His hand should have been burned.
Upon arriving back at the space port to find the door locked, Ezra calls Kanan on his comlink to apprise him of the situation. Kanan had sacrificed his comlink several scenes earlier in a ruse to lure the Inquisitors away. Kanan is able to respond to Ezra, as he has arrived at the port just after Ezra finishes speaking, though it is unclear given the distance between the characters if he was meant to have heard Ezra via a comlink or simply has very good ears and heard him from a good distance away.
The Seventh Sister mispronounces Kanan's last name.