I hate getting multiple flats on a ride. I was riding my local loop and I flated As I was finishing the first loop (Trailhead). I say no problem I fix the flat and start the second loop. Bam I flated again no spare tube , no patch kit, no pump ( I borrowed a buddy's earlier). so I have to walk 3 miles to get out, That taught me my lesson, "Always make sure your the lead guy when riding with your buddy's IN CASE you get a flat"...