Maybe he means, takes off in the driveway while in park! Been there done that!
Another thing to check that can make your noise. Look closely at all of your exhaust system. My 75 Sub has exhaust exits 1/4" below the running boards. When I get on it, they vibrate like heck and rattle the whole truck. Was scratching my head for a few days on this one.
2004 GMC 2500HD Reg Cab BOSS 9.2 V-Plow
2013 eXmark LazerZ X-Series 60" 34hp EFI (RED) Kohler
2006 Hustler SuperZ 28EFI 60" Power Chute Design OCDC SOLD!
1996 48" SCAG Belt WB 14hp Kawasaki Classic Deck
Echo 2 strokes PB-755 & SRM 280
Eastman WM20H 20" Commercial Push mower (NEW for 2013)
Commercial Lawnboy trim mower 3-FOR SALE!http://www.lawnsite.com/showthread.php?t=424203
Solo since 1980