SENSOR BOMB (forgot the name)

the sensor bomb would either be for engi or ars, basically how the sensor bomb would work is that when you equip it and go near a flat surface like a wall or the ground, you would place it down and there would be a kinda visible red line that when an enemy team goes on it, it will explode on them with explosion range so that is another enemy was with them they would die too, I feel like this would be a very cool thing to add to the game