The use of muons for structural analysis of road bridges represents an innovative application of particle physics in civil engineering. Unlike conventional methods, muon tomography utilizes cosmic rays to penetrate materials and can reveal the internal structure of structures like bridges without the need for invasive testing. The discussion among users touches on the comparative merits of using neutrons versus muons for these applications, with emphasis on the convenience of muons as they do not require heavy or cumbersome neutron sources. Furthermore, the capability of muon tomography extends beyond bridge testing to applications in mining and archaeological explorations, as highlighted by a reference to its use in discovering hidden chambers in ancient pyramids. This illustrates the versatility of two types of particle radiation in non-destructive testing, highlighting not only technical advantages but also possible unintended humorous social implications associated with people lingering near the testing sites.