A frightening dream experience can result in waking up with a jolt. Startling dreams of this sort are likely to be remembered. The calmer, non-threatening episodes are the ones we tend to forget. Unless we wake up there is little chance of recalling the dream the following day. A ringing alarm clock can be an asset because the early morning dreams are easier to remember.
Dreams come in an array of types.
For example, a dream, of several family members at a festive time of the year, would indicate a family gathering at a future date. This type dream can be called a futuristic dream. Another type is the warning dream. In this setting a dream typically provides a few details indicative of a mishap in some form. Warnings can help prevent accidents.