Holy cow that awesome!
Leo is my favorite and I'm jealous!!
At first I thought that dialouge was out-of-character for Leo, but then again this movie stays more true to the original mirage comic. In the comics Leo is the responsible, obsessive, fearless leader, but he wasn't a total prude like everyone makes him out to be. He cut loose, played pranks on his bros, used profanity and even cracked jokes in serious situatuions.
In one issue I read he telling Don it was too dangerous to climb to the top of an old barn. When his brothers commented that he is acting more like Splinter since being nearly killed by Shredder, Leo agreed and gave them permission to slap him if he acted that way again. Very funny...