Bam Margera showed us he's still got it when it comes to skateboarding skills ... he just needs a lot more warm-up than he used to! We caught up with the 46-year-old former skateboarder at LAX on Friday, as Bam was on his way to a skate event at Paul Rodriguez 's famed Primitive Skatepark -- something he's bringing his son, Phoenix , to check out with him! He told us he was asked to open the event with an 8-stair ollie, and wouldn't you know it? ... we found 8 stairs right at the airport for