Prevention

I was having dinner by myself when 85 year-old me showed up in a time-travel machine.

85 year-old me said he was reminiscing about how great it used to be to be 51 years old, and just couldn't resist the visit.

I asked the older me if he would like me to heat up a Hungry-Man Salisbury Steak dinner in the microwave.

85 year-old me said he made a grave error about the past and needed to leave right away. And like that he was gone. 

I didn't have a Hungry-Man Salisbury Steak dinner to heat up. I said that because I knew I greatly dislike that particular meal, and saying it would get the older me to clear out.