Oh dear, do I go with sarcasm or sincerity? Maybe a bit of each.
"I told you guys that wouldn't work."
"Okay, I was wrong. I'm not a Terminator"
"BRB"
"That sucked. I'm re-rolling a tank."
"Be seeing you...real soon."
or hopefully
"Loving Father, Devoted Husband, Mad Bastard, Academy Award Winner of 20XX"