[Shotimes] Wierd noises?

[WhetSuit36@cs.com]

       I was pulling out into traffic the other day, and had to gun it to go 
uphill to beat traffic.  Anyway, I immediately heard a "bang-bang-bang" noise 
that sounded rather like a loose belt.  Every once in awhile I noticed a 
high-pitched squeal that sounded like brake noise.  The bang-bang-squeal lasted 
about 2-3 minutes or so and was mostly when I was going up the hill.
       My engine temp. remained OK and I have not had a reoccurrence of the 
sound since then (yesterday).  Does anybody know what could have caused that?  
Looking into the hood, all the belts seemed to be in their right places.
       Maybe she just protested my hauling ass for that particular moment??

                                                       Karen ('93 Black ATX)