On my draw step with Choco/Mog Saga on the stack, and a Lunar Whale in play that could be crewed, I hit Full Control and flashed in Ambrosia Whiteheart, then with Choco/Mog Saga still on the stack, the intention was to crew Lunar Whale with Ambrosia Whiteheart to get the +1/+0 from Choco/Mog Saga and attack for lethal with Lunar Whale. However, upon resolution of Ambrosia Whiteheart, Full Control turned itself off, not allowing continued interaction. Additionally, I had clicked to stop on my Draw step (during my opponent's turn, no less) so both failsafes for this interaction were pushed aside.