The 767 Go-Around switches are in a different position than the one's on the 737NG and 777. The 737NG and 777 are forward of your hand and are activated by your finger tips. On the 767, if you let your throttle hand thumb relax and lower, it's in about the right position to engage the Go-Around switch. I've unintentionally engaged the Go-Around on both designs (767 and 777). It didn't happen on the 737 because the buttons are smaller and harder to move.
Maybe I'm a klutz but things get bumped.