Sunny wants to walk the remaining space over to Magnu, but as there is nothing for her to pull herself up with, she ends up sticking her butt up in the air for a few seconds, trying to figure out how to get the rest of her torso up as well, before giving up and crawling the remaining space over to Magnu. She gives him a high five, then uses Magnu to pull herself up.

"Alk!" she tells Lancelot, a word which here means, "I can walk!" as she takes a few more steps towards him before wobbling uncertain on her feet. She falls down again. This is common in people Sunny's size.