I would say either bullet casing, holding down s to go prone, the ability to roll with a combination of jumping then a+d and same time and the rare-ish instance of realistic diving.

The BODY SLAM. Mm-hm, when B19 launched it was so much fun to body slam their robots. Still is fun today.

Agreed. Also, always loads of fun flying at high speeds and kicking off the head of an enemy

Crouch and near immediate jetpack makes for a leap.

Flying with a craft.

You may think its not that great, but it is.

Probably doin a matrix style dive where you dive backwards, land in front of somone, and blow them into bits of physicy goodness.

Flying things into other things at really high speeds.

When something hits you that would usually gib you (dropship door, for example) but instead you just get knocked like thirty meters away and survive, with gun still in hand.

Body slams.

Dropship engines still emitting when detached and rocketing away.

Little story.

I dived down behind this rock thingy, fired my grenade launcher thingy over the rock while still leaning on it, the grenade bounced around, landed next to a clone, the clone got flung towards me and ragdolled into my face, then we both exploded.

True story.

THAT'S my favorite part, that it's so unpredictable.

But out of all of the types of physics, it has to be the walking/running. Not because it looks good or whatever, but because once I shot off a skeleton's arms and legs and left it there, later on I was running to the base and tripped up on the same skeleton.

Fun times.

Realizing your quadruple amputee clone is useless, then flying it very fast into a dropship engine.

Also, when an engine detaches from a dropship and gets stuck under something, or flies off into space.

And probably my favorite, the way you unload a whole machinegun clip into a clone, and each bullet does something different do it: sends a shower of sparks off it's armor, blasts a blood-spewing hole in it's face, blows an arm and a leg off, knocks its helmet off, shatters its weapon...so much happening in so little time. ^_^

When a DS gibs, but has it's engines intact, and one of those fly at me and completly does the following.

1. If a crobo trooper, will live, but go into a spinning craze
2. If an AAL marine, will lose a limb
3. If another regular DS, will lose engine and eventually gib
4. If an MPAM, will die of body loss
5. If opresser, will lose shield or weapon
6. If anything else, will die and gib all it's bodyparts

Sometimes they get detached and the dropship explodes but one of the lil engines flies back up into space and I wonder if it returns to the space station.

And thus the Insurance money youll have to pay because it broke the caffeteria window andall the clones went drifting into space.tHAT would be funny up untill you have -9000 oz .

My favoritephysics thing?The somtimes still occuring quantomleaps withdrop ship gibs,It is entertaining findingan intact dropship engine several meters underground withno dirt disrupted around it XD.

Actually, I like how you can crush other actors and knock guns out of their hands. Which is amazingly effective while playing as a Heavy Darklone. I did more kills with wrestling than I did with guns. (but then the CRobo heavy caught me crushing his friend and blew me up.)

i downloaded the level crossfire and started testing weapons while playing as one of the test dummys that are nearly invincible and using a DStech shotgun.....
so i was playing the level and had fun blasting whatever was reaching my base when i heard the sound of a crashing (dummy) dropship.....
the funny thing about it is that i got killed by a flying shotgun.