yes you can Brett Favre has done it numerous times
If it is the first forward pass or a lateral, yes. There is no difference (in the rules) between passing overhand or underhand.
Underhand is where your hit the ball by reaching forward underneath it. Overhand is where you hit the ball above your head. Which one you use would have to depend on where you are relative to the ball. If it is above your head, you will have to use overhand (maybe you will have to jump), while if the ball is going to hit the ground in front of you, you will have to use the underhand hit (and you may have to dive for it).
An illegal forward pass happens when the QB crosses the line of scrimmage and then passes the ball forward or when a forward pass has been thrown and the player holding the ball passes forward
In an underhand serve, you ball you fist and hit the ball with the palm of you hand while in the fist. You hit it like you are throwing a ball underhand. Good luck!
Lift
Overhand (throw the ball up, take a step forward, and hit it with your opposite hand) Underhand (hold the ball in one hand, take a step, then swing your arm like a pendulum with a fish and push it out of your hand) Float (same as overhand, but freeze your hand once you hit it instead of following through) Jump (step forward, throw the ball up in front of you, take one last stride, then jump and hit the ball as it is descending) Top Spin (the ball spins forward) Side Spin (the ball spins sideways)
A fumble is a fumble, no matter what direction it goes in, but a player cannot advance the ball forward through the air once they have passed the line of scrimmage.
It's pitched underhand.
Illegal hits in volleyball: -Catching or holding the ball -Hitting the ball underhand with open palms -Throwing the ball -Changing the direction of the ball There is also a thing called a double hit, which is generally called on for setters, when the ball hits their hands at a slightly different time while setting the ball. However, double hits are legal on a team's first hit, but not on subsequent hits. Also, contacting the ball with any part below the waist is now considered legal.
Forward
The ball must be passed either in line with the ball carrier OR as is normally seen to the rear of the ball carrier. A ball thrown forward, dropped forward of the carrier or knocked forward of the ball carrier is a penalty offense
She finished knitting the scarf by using an underhand technique to create a neat and even row of stitches.
All of it. It's not where the player's body is, it's where the ball is. The ball has to be completely across the line of scrimmage to count as an illegal forward pass.