Originally posted by XprincoX
hmmm interesting discussion here. But im kinda confused. So are you guys saying you can shift without steppin on the clutch?? So just forcing it into gear?? 
You don't FORCE it into gear. You wait till the engine coasts down to the proper rpm, then it just drops into gear.
You can think of the synchros 2 different ways... Normally you push against them till they force the gears to match speed. This works when the clutch is disengaged; synchros aren't strong enough to force the whole engine to match speed.
If you don't disengage the clutch, the synchro blocks you from shifting into a gear until the gears match speed. Just push gently against the gear you want to go in, & wait till the synchro lets you in. When it lets you in, you gotta be ready to push it all the way into gear quickly before it's too late. It's just a little tricky - I'm not gonna let you practice on MY car...
Like someone said, it's just a novelty, or maybe its an education for how synchro's work.