Although Dilli managed to elevate herself along with Chan from the ice, she couldn't keep it up forever. See the weight on her back along with the fact that she is using hooks to pull herself closer towards the ice, which doesn't allow her from flying off and being dragged by the win as a result, doesn't allow her to fly too long.
We can consider her trick as a long long leap, it would be more appropriate. Her first leap got them 30 meters up, as for the landing on the ice again it indeed became tricky and if not careful it can become bone braking too.
The first leap hurt her foot but not enough to break it, what was the result of it? She learned how the land the second time she does this leap. She figured out that the trick to success here would to blast a bit more fire than usual through her toes in order to melt through the ice and confirm a grip.