Good Riddles

Question: A man named Tom goes to a party. Him and three guests go into a back room to play some games. A few hours later the four of them are discovered dead. One was beaten with a shovel, another had a drill bit in his head, and the other had been clubbed to death. Tom has no marks on his body.

How did he die?

Question: How can you make a TV, a bed, a dog, and a car liquid?

Question: These are the three lives of mine:
So gentle I soothe the skin,
So light I caress the sky,
So hard I crack rocks.

What am I?

Question: What can be swallowed, but can swallow you?

Question: Four hang, four sprang, two point the way, two to ward off dogs, one dangles after, always rather dirty.

What am I?