Tony has to stay awake for a very long time for some reason, and when he finally is allowed to rest, he physically can't, so the rest of the Avengers (but especially Steve) take care of him until he can.
With two hours to deadline, Tony finally managed to unsnag the last line of code and send it through. A new smart AI bot, one designed for searching and detonating IEDs so soldiers wouldn’t have to, whirred to life and aimed its tiny periscope cam at him inquisitively, awaiting input. The right mix of AI–not so sophisticated that army programmers could turn it into an offensive weapon, but not so improbably slow that it failed to do its job. Three iterations ago it’d tried to bring the dummy bomb to Tony, and that was clearly a no go, so he’d started the code from the bottom up and programmed until the edges of his vision went blurry. It needed testing. Testing.
“Find,” Tony grunted and the bot happily rolled off to the mock test range. “Not perfect,” Tony murmured, slumping down against the table to watch. “Just functional. Just need you to do your job. Can tweak later.” It’s little treads bumbled across sand and rocks, grinding a little in a way that, just for a moment, sent Tony back five years in time. His fingers clenched compulsively at the table before he forced himself to let go.
In the sandbox, the little bot scanned back and forth with infrared and ground-penetrating sonar and blessedly, beautifully, it located the payload. The shovel arm activated and started digging. Tony nearly wept.