From PsychopathicRampage:
What is your Widow’s bite?
And What would you do if you were ghosts haunting the Avengers Tower?
Natasha: Were multiple purposes for them. I have the following options.
Widow's Line - Retractable grappling hook and cable connected to the gauntlets, mostly used for rooftop gliding, rappelling and climbing up steep cliffs and hills.
Widow's Kiss - An aerosol instant knock-out drug, pioneered by Russian Spetsnaz. When used it appears to be purplish pink fumes that can knock out a person for more than twenty hours.
Widow's Bite - A high frequency electrostatic charge that also act as percussive energy blasts, that it effects can be felt for at least a month. It can deliver charges up to 30,000 volts. The "Bite" can be set to deliver minor shocks that causes stunning or high voltage currents that can be lethal.
Explosives - There are many types of explosives stored in the gauntlet which includes grenades and other types of explosives that can cause damage to an opponent.
Tear Gas Pellets - There is also tear in the gauntlet that can cause blindness when released. It can also cause the opponent to be knocked unconscious.
Radio Transmitter - This enable Widow to lock on to a target and track its every move. If placed on a moving vehicle like a car or bike, it enables Widow to track down their location.
Also if we were ghosts haunting Avengers Tower I would cause the elevator to stop and make it so no one could rescue whoever was inside so probably Tony or Cap. I would also make all the electronics in the kitchen go nuts.
Clint: I would lock Tony in his suits and also sometimes take his suits. I would make them fall into the Oceans or a lake so he would never be able to find them. I would take Thor’s pop tarts and I would fool Cap into thinking that Peggy was there as a spirit and scare him. :P