["I was scared at first because the water looked cold and the pool was deep.  When I saw my Dad's face however, I knew he would catch me so I jumped in the water.", 'So... was it cold?', 'It was a little cold, but it was not as bad as I expected.']
I'm so glad your dad was there to help you. Did he catch you?
When I was little my dad asked me to jump into the deep end of the pool and he would catch me.  I didn't know how to swim yet, but I knew I could count on him, so I just jumped.