Past Simple or the Past Continuous. Плз помогитеLast summer, we (sail)

Past Simple or the Past Continuous. Плз помогите

Last summer, we (sail) off the coast of New Zealand when we (see) a group of dolphins. They (jump) in the water. We (stop) and I (dive) into the water to take some photos of the dolphins. I (take) photos when one of the dolphins (swim) towards me and (push) me towards the boat. The other dolphins (watch) us all the time. They (not play) any more. I (look) around and (see) a huge shark. I (get) out of the water very quickly. When I (get) onto the boat, the dolphins (disappear) at once. They saved my life.