Arsenal fans are fuming, and with very good reason.
Sunday is the last chance for their club to finish in the top four, you know, secure Champions League football for next season.
They did the first part right - and the third for that matter - scoring twice to go 2-0 up against Everton at the Emirates Stadium.
A victory gives them the only chance of finishing in the top four, after all.
However, they got the second bit very wrong. Or rather, Laurent Koscielny did.
The French 31-year-old managed to get himself sent off in just 14 minutes of Sunday's game, to make Arsenal's job against the Toffees that bit harder.
But wait, there's more.
The straight red card, given for a totally unnecessary challenge, rules Koscielny out of the Gunners' FA Cup final against Chelsea next week.
You know, the ONLY opportunity this season for Arsenal to achieve anything...
And well, understandably, fans are absolutely livid.
Here are nine very funny reactions to the sending off...