How is asking a simple question getting edgy?
Killian did a version of the jump? I'd like to see that actually. It doesn't happen in the bootleg I have of him. Do you have a youtube link by chance?
As for a reckless thing both Enjolrai do is standing up at the top of the Barricade, exposing himself to gunfire and cannonshell.
Most Enjolras do that. It's part of the staging. But then again, all the other Amis are there as well. The only exception to this rule is Grantaire, who doesn't get on the barricade until after Enjolras grabs the flag.
In the new production in the US Tour, they actually get on the barricade by climbing over it from the NG side.
Honestly I think Thaxton is the only one I've seen that pretty much flung himself from the barricade to get to Marius and that's more recklessness on the actor's part (though he likely wouldn't have done it if he thought he'd be seriously injured, at least I would think so) and not on the character's part.
Enjolras isn't reckless is either the Brick or the musical