After riding home in the rain last night I accidentally left my headlight on for about 10-15 minutes without the engine running. This morning I wheeled the bike out onto the road and hit the go button... "Rrrr.........Rrrrrtt...... Rrr...... Rrrrt" not a good sign. Seemed the battery was dead, gave it another shot, slowly turning over, not starting. Well I had better roll start it - So I slowly made my way up a very gentle incline pushing the 270kg Harley Davidson to the top. Well, that was tiring. I pointed the bike down the road, turned the key, put it in second gear and pulled in the clutch. I started running down the very small incline, so much effort, got about as much speed as grandma making her way to the bingo table - jumped on and dropped the clutch. The bike stopped immediately and didn't turn over - I was not going anywhere nearly fast enough for the 1200cc engine.... Well fcuk, better call roadside assist for a jump - But I will try to start it just one more time. I pressed the go button as I did earlier, expecting the same pathetic whine and not to start - but this time it fired up straight away "CUUUHHThummmmmm potatopotatopotatopotato" and away I went. My question is - why did it decide to start the second time around? Did the 100 metres I pushed it somehow charge the battery? Did the shitty roll start I attempted lubricate the piston enough for the weakened battery to move it? If it didn't start the first time, how did it start the second?