I plan to go to NorCal in the summer to go up Mt. Diablo, i'll take you on that offer

I was super out of shape like 4 years ago(200 lbs and haven't ridden a bike in 6 months cause I was lifting alot). My best friend lived in SF at the time, asked me to come up and ride with him...He takes me up Mt. Diablo. I bonked so hard and had to walk the last mile to the top. I was descending at 15 mph. Worst day on the bike ever. I told him we need to go back cause that experience is still ingrained in my mind lol.