I'm not sure how faithful this is to TA, but one of the times I was playing spring, people really liked to do combombs .. .that is, build an air fact, a transport, and then pick up their commander to bomb the other team with it.
It was only particularly viable in multiplayer games, where after blowing up your commander, youd still have a team able to capitalize on that you have an airfact, and one of the enemy team completely doesnt exist. There was the minor issue of handing 5k metal to your enemy though..
In either case, it was hilarious. Granted, it was even MORE hilarious when you just built an airfact, and flew a transport to the other side of the map just to abduct your enemy's commander... It was hilarious how often that worked.