I'm new to this site so I don't quite understand everything about LDs' and was wondering whether some people could give me some advice. Heres the story

i had a really bad LD last week but today i got woken up and then went back to sleep and then had an amazing LD ... It was unbelievable!!! Everything was so real but strangely i couldn't fly!?! (which i did with ease in the last one) any ideas why? Todays was a lot more vivid! Also when i attempted to fly i was at school and suddenly nearly all the school ran past my trying to fly aswell, making a giant pile up! Is this normal in a LD, everyone copying what you do? thanks.