my a/c belt tensioner FELL OFF!!

i was driving back to the shop where my boy advanced my timing & something started rattling REAL LOUD. all of a sudden, i hear/feel something hit my firewall (?), then bounce off the road into the bottom of the car. i looked in my side view mirror to see something skidding across the road… i’m like WTF?! ****'s falling off my car all of a sudden!!! well i turned around & darted through traffic to pick it up & brought it to the shop w/ me & my boy had to raise the motor & pull all that crap off that side to get it back on. has anybody else ever had this bolt just snap on them?

had the same thing happen to me from what i hear it is pretty common, the bearings in side of the pully locked up and broke off but the bracket stayed on, i bought the pully and bracket from a local junkyard for 25 and had to get a new belt for 15, i installed my self and spent only 40 the shop by my house wanted nearly 210 parts and labor, this is very easy to fix if you can do your self