Goosebumps (reading of the day)

I have read today seven pages of the story.  In those pages I have read about one family which is mine, I assumed. My family is gone to a musium of natural history beacuse my parents love to visit musiums. I'm not interested to visit musium but I visited because of my parents concerns. In musium, my parents give responsibility of my elder brother denny to me. Denny is annoying me a lot in musium. I'm getting bored. Suddenly Denny runs down stairs in hall. I followed him but he got invisible from my eyes. I get tensed but I see one door and I opened that door. there I see one old scientist, he's working in a large computer. That scientist see me and he think that I'm her volunteer in his experiment. He doesn't give me chance to speak. He tells me about his time machine experiment. I wonder and I get excited by knowing this that I will be first time traveller but I think about my brother. Scientist says to me "be fast, we don't have time". I think that when I will return here again then I will find my brother. I say yes to that scientist for being first time traveller. Scientist bind one buttons chain on my neck and he says these buttons are for present,past and future. I understood whole concept. He started time machine but suddenly my brother denny comes and jumped into time machine. He get disappeared. I'm scared. I ask to scientist what to do now? He says you have to go past or future to bring back your brother. I say okay. I pressed future button. I come in future. I'm in New York city of future. I see my future self with my family. My family is going to other side of road but there is a truck who's coming Very fastly near to my family. Now, I'm scared and confused what to do?