I'm glad nobody was hurt! I think I'd take a look at the front hoses and see if they need replacing and do them all at once.

I'd suggest a fluid flush/change while you're at it if it hasn't been done in a while. Get about 3 quarts of brake fluid.

There is a single bleed point on the rear - driver side, I think. Bleed the rear first, then the right front and then the left front - always working from the furthest point toward the master cylinder. Continue flushing/bleeding until the fluid runs clear and no more bubbles are seen. Don't let the reservoir run dry or you'll suck air back into the system. When you've completed all 3 bleed operations, go around and bleed them again. Drive the truck - CAREFULLY - you probably won't get all of the air out the first time and the brakes won't do very well. A careful slow drive will dislodge any remaining air pockets. Hit some good bumps intentionally on your drive. Come back and bleed it twice around again and you should have it.

Good luck,
Frank