講述電視/電影內容, 應該用咩tense?

Case 1: 同朋友一齊睇緊套野, 大家討論緊故事內容
1) to talk about someone or something
- That waiter was so stupid!
He should HAVE OPENED the door for the rich man.
( to tell your friends what the waiter should have done)
He should've opened .........<-------------Contraction ( oral English)
- She've already called someone. ( to remind your friends of what she HAS DONE)
I think she is going to go out. ( Your thought here)
( This action has not yet taken place in the movie)<------

Case 2: 朋友行開左, 得番自己睇, 之後朋友返黎, 我講番佢miss左o個part
PAST TENSE;present perfect tense and XXXXX
- Julia has left Peter<---------------
- A serial killer killed Jane. <------------
- Oh! You've missed the best part, Ming Jai( your friend).
Tom Cruise finally stole the secret box.

Case 3: 同朋友講一套我n年前睇過既戲.
Mainly past tense + XXXXX
I saw the movie " ......" a few years ago.
The actors and actresses performed so well.
...... was the lead actor and ......... was the lead actress.
Jane was Peter's girlfriend in the movie.
............................
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What is XXXXX? That's PRESENT TENSE.
We do talk about the past with present tense.( exciting scenes)
Here is a good example for you
A: Jane, I saw something frightening in Jordan yesterday afternoon.
B: Really? What did you see?
A: At around 2 pm, I see 5 masked men get off a van outside a bank.
They rush into the bank, point their guns at everyone,
ordering them to get down on the floor . One of the robbers jumps
over to a counter ,points his gun at a female teller's temple and orders her to open the safe or something.( To talk about this on-going action with present tense)
I was totally shocked! ( past tense here )
To tell B how you felt at that time in the past<-------
B: Did you call 999?
A: Yes, I did.
Now you know we may talk about some on-going actions in the past with present tense.
This tense can be applied to any of the situations above.