Out for my morning 20 miler on single bike.
Fast flat on rear of Serfas Seca 700x23 tire.
Heard rear wheel go 'plop/plop'; stopped quickly. Shard of hard black plastic penetrated the FPS (Flat Protection Systrem)
easily and left big gash in center of tire. Only 816 miles on that Serfas.
Found small empty plastic/foil packet for hot sauce (like available in fast food places) on roadside and stuck it between tire and
spare inner tube. Pumped it up got got home just fine.
Replaced that tire with a Maxxis Re-Fuse.
Someone's trash is someone's saviour!