An important part of a caterpillar’s survival strategy is to grow rapidly because at this stage of their life-cycle many species are extremely vulnerable to predation and to have the best chance of survival they need to pupate within a short space of time. However, there are species that remain caterpillars for a prolonged length of time, some overwintering and in the case of the Goat moth caterpillar remaining inside the trunk of a tree for several years.
The speech was enthusiastic and got the team excited that they could win the game. Someone at a theme park would be most ebullient because they would be most enthusiastic from having fun.