[Apps] How best to show off your amazing smart-phone?

Recently grabbed the HTC One M8, and this thing is amazing - a HUGE upgrade over the EVO 4G LTE. It uses Spark too, which really makes a difference inside the building where I work.

Anyway, I am exploring different apps I have accumulated over the last couple years, and some of them really shine on it, and I was wondering what you guys find is an amazing way to show off your fancy smart-phone's capabilities.

And really I am talking graphics, smoothness, responsiveness, etc. If yours can calculate an Excel spreadsheet really fast, that's great, but it's not much to show off.

Some of the ones I have found really are awesome on here:

Beach Buggy Blitz
Shine Runner
Smule Magic Piano
Smash Hit
Plasma Sky

That's a just a few, but I know there must be some really great ones out there.

What do you guys like?

(a note on Smule Magic Piano - this app has always been great on an Apple Ipad, etc, but it has never, until now, been acceptable on an Android - there was always a lag which made it useless. But now, with this latest generation of hardware, I can honestly say it uses this program just as smoothly as the Apple does, so it's taken them a while to catch up to Apple in the area of performance and reducing input lag, but they are finally getting there)

 

Ok, pardon me, maybe 'show off' is a poor choice of words. I, being a man, enjoy the flashing lights and bright colors, and I appreciate it when it is done well. All I was asking is, what apps/whatever have you liked which you thought really allowed your device to make you make that 'Oooh! Aaahh!' sound when you see it? My intent is not to walk around and show it off to other people, my inquiry was intended only for my own gratification.

Scionxa, yes, it is a nice phone, no case for it yet though.