VIDEO: Lionel Messi doubles Barcelona's lead, moves in on Champions League record

Here's your weekly reminder of why giving up possession to Barcelona is so dangerous.

Already up 1-0 in their Champions League fixture versus Ajax on Tuesday, the Catalan club capitalized on a costly giveaway as Andres Iniesta collected the ball in the Dutch club's half and fed a perfect pass to Lionel Messi, who did what he always does.

The finish marks Messi's 69th career goal in the Champions League, leaving him only two goals behind Raul, who holds the all-time record.