Commingling the boulder of retrospect

The city resider was strolling on his bicycle with his accompanying nimble acolyte, who wasn’t at all tacitum, kept ascending and plopping on his saddle, prancing about, making his companion to fret and repine. At the next instant, a scarce noise like a brattle, commenced to emanate predominantly from the rear shaft.  They both terminated.

“I discern a brisk wobble on the back wheel”, said the resident.

“Spin the wheel faster as if to…” but the latter didn’t managed to completely develop his remark. He was abruptly interrupted by the afflicted protagonist. With a scowl drawn on his face he regarded:

“Stop playing the erudite and allow me to detect the malfunction! This susceptibility of yours, I can advise, is quite irritating!”

“But, I am not performing the witty… I just…”

“Yes, you do… stop it, allow me to hearken...”

At the same instant, an ambulance started racing and blustering loudly, shrouding the whole ambient in mere peril for the members’ ears, an explicit, outrageous ado. The speaker was hollering as voluminous as an old-steam engine’s horn. Both pals were kneeling down, with the inspector, trying to detect the source of the vibration while the ambulance was shrieking just about eight feet further from the spot. With contention, the surveyor stated profoundly:

“I think, I know what the problem is.”