A final convulsion lifted her from the bed, until she appeared to rest upon her head and her heels, with her body arched in an extraordinary manner. 
Her body was arched from resting on her head and her heels after a final convulsion.
There was no sign of a convulsion as she rested on her back.
Keep a cellphone with you at all times!
The people are on the floor.
A man is reading a book.
Three men are talking
The students are participating in a study group.
definitely a false