What does Juliet see right before she drinks the potion?

The friar proposes a plan: Juliet must consent to marry Paris; then, on the night before the wedding, she must drink a sleeping potion that will make her appear to be dead; she will be laid to rest in the Capulet tomb, and the friar will send word to Romeo in Mantua to help him retrieve her when she wakes up.

Juliet sees Tybalt’s ghost right before she drinks the potion