Found a massive mushroom!

Do you know that: 
You want to go on a cycle and think, hm, there could be a tad more air in the tire? So you get the pump, plug it in, and weeeeeeeeeee, out goes all the air from the tire. Then you pump and pump and pump, and you stick the damn pump on several times because it could be sitting wrong, and all the time you never get to reach the air level in the tire that it had been before. In the end, you say eff it, I'm going out with my half-flat tire, and then the weather forecast was wrong and I got rained on all the ride. 

Pretty much sums up my life at the moment ;)