Lighten up, Gregory2001 ...it wasn't an intentional hijack.
The way I see it, Skinhit saw the word "bump" ..and as he'd always wondered what it meant in the literal sense, the opportunity presented itself for him to find out once and for all. So what if it was in this thread ...there are bigger things in this world to worry about than a very minor aside in a thread.
Besides, this community is all about 'getting along with each other' ...Skinhit's lighthearted posts are a welcome addition to any thread, in my opinion.
Pouncing the way you did, Gregory2001 ...won't win you much help & support from the community, and I'd suggest a rethink to the way you respond next time.
Have a nice day...