Strong heartbeats during WILD attempt

[huga]

Hey guys Last night i tried to WILD and everything goes as planned, i maintained a relaxed body and mind and start visualization, the last thing i remember before transition kicks in was a glass of tea and then the picture start to darkening in center. After that I feel my heart start beating so strongly and fast, the picture change oddly and i still knew that in what stage i am so i tried to be calm but after six or seven images that comes and goes then it was an "Absolute darkness", Nothing happened and still i could felt my heart beats very strongly and fast it was kinda painful, i standstill for a moment then i decided to wake up and opened my eyes then my heart rate started to decrease in awake world. Anyone know what happened? Do you guys experienced that strange and powerful Heartbeats during your attempts ???