Problem! – Transitions (Editing)

I came across a problem where i don’t know how to create a transition to the imagination sequences. I found this video online which will help me create some using visuals and sounds.

In Lost – The Greater Good they use sound (bass sound effect) to tell the audience that there are going back in time. I am going to use this technique when i go back in time with my imagination sequences. I could also use the technique used in Big Fish, they use bright colours and a voice over. This will be perfect for my short film as my main character is taking to the interview i will have his voice over the imagination sequences and have them bright and colorful telling the audience, from the visuals and the narrating, that this was in the past and that this is a flashback.