Valve problem, if two way valve. I dunno, I answered to bump this up where someone who knows might see it, because it seems like a weird thing. Like a Three Stooges movie too, does fire shoot out of your faucet?
Measure twice, cut once.
Look at the nail, not the hammer. Watch the fence, not the blade.
If you hook your thumb over your belt you won't hit it with the hammer or leave it layin on the saw table.