Do theses sound natural?
It's so hot that Amy passes out while she was waiting for bus.
He got so drunk that threw up and passed out .
Nick must pass out when he sees that needle.

Question

Do theses sound natural?
It's so hot that Amy passes out while she was waiting for bus.
He got so drunk that threw up and passed out . 
Nick must pass out when he sees that needle.

Answer

It' was so hot that Amy passed out while she was waiting for the bus.

He got so drunk that he threw up and passed out.

Nick must get passed out when he sees that needle. / Nick must have passed out when he saw that needle.