• There is a Bitcoin wallet containing 10 Bitcoin.
• Two people on two separate computers open the Bitcoin wallet simultaneously.
• They spend 6 Bitcoin from the wallet.
• They hit the Send button simultaneously
• They have set up the timing and positioning so that they are the same time/distance from the nearest Bitcoin node (I know this is silly, but this was the hypothetical presented to me)

What would happen?

My friend asked me what would happen in this situation and I think I know what the answer is, but I thought I'd confirm with the community, so I can say that I heard the answer from other people as well. Gotta be able to answer newcomer questions, if we want Bitcoin to be successful, even silly or weird ones.