I just played a pub game today where me and my four friends played Same hero Engineer. I came to a realization about his mines - It needs a manual trigger button so that you can make it explode on command. The reason to this is that, when Engineer is planting all of his mines in that certain area, there's this seldom occurrence where there's a mine far away from the designated area of mines. But, the problem in that is that, It's the third mine you planted. So, you tend to plant 2 extra mines and wasting a lot of time and mana. You should at least allow the player to self-destruct the mines so that we won't need to use up those precious seconds and mana. And to add to that, we could actually do some big plays with this implemented. If you self-destruct the mine, the mine will still do the same amount of damage, but only in the area It's staying on. So, what are your thoughts on this?

Edit: Accidentally some words...

Edit2: With all of this positive feed back, I hope S2 implements this or the Spider mine idea.