The Cajun flinched back when Sabo reached for him, entirely prepared to get hit, or yanked in, or shoved back, or exploded by his own powers-- he'd seen what Sabo could do with that dark, metal-looking arm when it appeared, and he wasn't keen to be a substitute for the huge shipping container.
But that hand didn't land a blow, instead, it just grasped. And that was when Gambit tried to jerk away, suddenly realizing he would set Sabo on fire if they connected... but he didn't. And when he didn't? Well, his entire body relaxed. Harry was forgotten as he leaned into Sabo-- who was a good two inches taller than he was-- and draped his arms around him.
It was Gambit's best version of some.. strange hug. Really, it was just him being exhausted and feeling safe for a moment. Even if Sabo could have blown them both up, it was better than setting everyone on fire-- at least, that's what the Cajun thought, since he was used to blowing things up.
"Promise." He reassured, his chin set to the blonde's shoulder.