My 97' 90k escort has a strange rattle when accelerating.

I thought there might be a loose bolt somewhere but wasn't sure. Going to check here to see if you guys have any suggestions.

hehe...everything in my car rattles/vibrates. Window cranks, dash, seats, somethin in the glovebox too...It's funny cause each one does it at a different RPM, so I know which one is going to vibrate and when...

if it has a rattling metal sound its probably the exhaust, check at all the flanges, but most likely your muffler.