Sausage exploded and looks foamy I cooked turkey breakfast sausages in a 350 F convection oven and one exploded. The stuff that came out looked a little foamy and the juices before it was cooked looked a tiny bit foamy. This may be completely normal but just want to be sure if it sounds safe to eat. The sausages were packaged five days ago and expire in two days. They didn't smell bad or anything. Thanks!
That foam is perfectly natural.

The foam is the result of meats natural protein composition. If you've ever poached eggs, or boiled lobster, or cooked a stock, you'll know that the water can become a little scummy. If you leave the pot on, that scum makes a white-ish or grey-ish foam that forms lovely looking rafts. That foam is made of water soluble protein.

In your case, you have wet sausage meat in a case. A small amount of that meat's proteins, mostly sarcoplasm and myoglobin, are going to escape from their cells and into the meat juice.

When the sausage case breaks, that juice, a mix of water and protein, is escaping into a hot oven, and the proteins are going to spontaneously denature, forming a foam much like scrambled eggs.

If anything, you should be happy- water soluble albumin foam is a sign that the sausage is full of proteins, and is definitely made of meat, and not, say, recycled chipboard. 

Enjoy the sausages!