Further to Annie's (correct) answer,this is from Wikipedia:~
"The cake makes Alice grow so tall that her head hits the ceiling. Getting frustrated and not to mention confused, she cries. Her tears flood the hallway. The White Rabbit runs by and is so frightened by Alice that he drops the gloves and fan he is holding. She fans herself with the fan and starts to wonder if she is still the same person that she was before. The fan causes her to shrink again. Alice swims through her own tears and meets a mouse, who is swimming as well. She tries to make small talk with him but all she can think of talking about is her cat, which offends the mouse. The pool becomes crowded with other animals and birds that have been swept away. They all swim to shore."