Context: I have to go rock climbing with some friends. I have practiced climbing indoors, but have never done a big climb outside so who knows how it will go.
Speaker 1: I'm going rock climbing with some friends!
Speaker 2: That sounds fun and scary! You must be pretty fit to take on that challenge.
Speaker 1: I have done some climbing indoors for practice, but never done a big climb out doors, so who know how it will go.
Speaker 2: I'm sure that there will be some differences, but I'm sure you will nail it! Just remember to be safe!