Wtf made that sound????

It's 4:48 am here. Ten minutes ago I heard a bang in my living room randomly it kept on.... so I thought it's just the fridge. I ignored it and kept reading online. Then suddenly I heard a puff sound. Kinda like a kettle makes I tried to convince myself that it's the air conditioner.... the oh shit I remembered I took the extending cord to charge my phone. Again I convinced my self that it's raining. Looked at the weather no rain. So I ran to my bed scared shitless and here I lye frightened.
Wtf made that sound????