Most memorable training attention gainers?

We used a BUNCH of good attention steps when I taught at the Air Force Senior NCO Academy. For the class on conflict resolution, we always used this one:
http://www.youtube.com/watch?v=NBvysuewIOs

"Get in my guard" has always been a popular video from YouTube in combatives.

I used this as an attention gainer prior to instructing a piece of comm gear that translates different signals.

https://www.youtube.com/watch?v=fXSLcYQHqFQ

This is a great video entitled "Why Leaders Eat Last," perhaps a bit too long to use as an effective attention getter, although there are several clips that could be parceled out to reinforce certain points in a presentation. It is certainly worth a moment to check it out: http://vimeo.com/79899786

Here's a great attention getter, it's brief and to-the-point, it engages the imagination, and would make an excellent compliment to numerous military subjects... check it out here:

https://www.youtube.com/watch?v=tjgtLSHhTPg

In order to promote continued discussion on this and related subjects, here are just a few discussions that you'll want to check-out; thank you for all that you do, and... see you all in the discussion threads!

As a Corporal, I taught a class to 2 companies from our Battalion on the use of field comm gear when you are not a field radio operator. We were out in the field for our yearly NBC qualifications. I had everyone, Officers included, sitting in the field as I started talking about the need for everyone to know the basic assembly, operation and how to call in for support when their radio operator is taken out of action.

Once I knew enough of the Marines were starting to zone out (not hard with 2 days straight of instruction and gas chamber work) 2 of my Platoon mates discharged a couple of CS canisters behind the class (we sat them this way so the wind would drift it across the whole class). I casually disconnected the antennae from the PRC-77 I was holding and threw it to the right. Disconnected the handset, threw it to the left, dropped the battery case and tossed the battery behind me. By then, most of the Marines were looking around for that annoying gas - none of them putting on their gas masks!

Our Comm Chief, our Platoon Commander and a couple other Staff Sergeants started running around yelling "You are dead". I started yelling "Who is going to call in the Medivac?" At the end, we had less than 20 Marines with gas masks on as they were trying to figure out how to reassemble the radio and do - something.

My class was only another 30 minutes after that but I had every eyeball, from the Colonel on down.

Back in 92 all engineers got some sort of demolitions training, so all the constructions AIT trainees spent 3 weeks training with a combat engineer. Day one the Staff Sergeant holds a block of C-4 and goes thru the destructive power of C-4 the throws it as hard as he can across the room, we all hit the floor. He laughs at us and tells us "hell fella's we cook with that stuff". Then explains unless you use a blasting cap or some other source to detonate, it is perfectly safe. Best 3 weeks of training I ever had in the military.

My most memorable training attention-getter was supplied by our platoon sergeant at the conclusion of hand-to-hand combat training in BCT when he commented, "When you run out of ammunition, go find more."