Truck died while driving

My 2000 tundra died while driving when I opened the hood I noticed the lower radiator hose had come off.
What should I do after I put water in it and re connect battery terminals. I took battery terminals off just because....will my truck restart
I didn't notice any smoke coming from under hood ir nothing. Gauge showed normal temp prior to all this.
Last night we had really cold weather that us Texans are not used too...

 

What exactly happened when it “died”? Did the engine stall or lose electrical power or what?

 

Lets hope it fainted instead of died.

 

Funny it did just faint....
Hooked battery back up and wham back in business

 

Mist have been a safety feature toyota installed....