Assuming you actually do get the bad guy started into the throw,
if he can reach you then a common reflex is
for him to hang on for dear life on the way over, and the more severe the throw,
the more powerful the grab. This makes sense to him since he thinks you will
hold him up. Physics does not agree usually and both parties will end up
on the floor.
Fortunately, we know from training that this is not usually such
a good counter to a throw, since if the thrower is fairly savvy, he can use this
as an opportunity to badly slam the receiver.
Of course, your best bet is to all together avoid having him
muckle onto you. You should either foul his arms so he cannot
grab you or be in a location where he cannot reach you for a grab, such as being
behind him. E.g., doing a shoulder throw while either crossing the other arm across
uke's body (juji seoi nage), throwing to the uke's rear (ushiro seoi nage). As a
further example, a major hip throw can simply pin the free arm to uke's side.
In the case that he does get hold of you, you should practice throws as sutemi as well
by either dropping to one knee or falling on the receiver. This requires a bit more
illumination, so here is a small discussion of sutemi and its uses. Generally there
are three ways you might need to go to the floor when throwing.
In the second case, the receiver cannot tap, it should be noted, if he
is truly hanging on to you and this will make the impact quite severe even on mats.
It is best to have ample practice of nage komi (controlling -- well,
powering actually -- the person to the ground)
when he hangs on to you, but this requires thick mats and usually has
an enormous amount of wear and tear on the receiver. In practice remember that when
the receiver has both arms unavailable for tapping (he's hanging on for dear life),
the landings can be much stouter
so either extra mats are indicated or a lighter touch. There it is imperative the
uke use his feet to tap powerfully.
You should also realize that when people ask you to show them your stuff,
what they sometimes really want is to show their stuff, with you in the role of really
nice chump (someone to be taken advantage of). Some people have an almost pathological
need to win, and no matter how civil you are, they will still try to do something
goofy. Indeed, the more civil you are the more it encourages them since they confuse
being reasonable with being weak. This is especially true for someone
macho struttings -- part and parcel of "psyching out" the opponent.
They tend to think
they've won if you aren't making right the pre-game noises at them, plus they get
lulled into the mindset that it will prove how tough they are at the same time they
heavily rely on you to play by the rules. We call this cheating normally, but a romanticized
"outlaw" mindset means that
getting away with it no matter how stupid holds a lot of appeal for them. They can
finally be a winner in their little miserable lives. (Sorry, I've run into some complete
You'd also be amazed at the number of tough types
who will tell you the being thrown is simply not effective. This is because they
don't know how to throw and the closest thing they can relate it to is slipping
and falling, which while uncomfortable is hardly serious. As such their courage
is wide but not deep and actually seriously doing a technique on them is apt to
make them frantic in which case they will up the ante and a simple demo can spiral
out of control. It is best to avoid demonstrating on people like that since you
might find yourself in a self-defense situation.