Alot of hondas are notorius for having the heat shield on the catalytic converter rattling loose. I had a 97 gsr that did that and did the same thing you're describing. I'd let it cool down, jack it up, and check all the bolts on the heat shield to make sure they are tight. I've also had the bearings break on an aftermarket short shifter and it gave me the same problem with the rattling noise but you could feel the sloppy shifter and there was no doubt where it was coming from.