Time Machine still secret

Just had a great time exploring the future again in my time machine. I gotta be more careful though, I just saw that in exactly two years from today Chris Frazer will start to suspect I have a time machine since I have been harassing him so much in the future. I cannot let his suspicions grow too deep, so during my next trip to the future I plan on pushing him in front of a bus. I will have to start messing with someone new, hopefully I will be more careful next time.