Cable car jump over river. Ultralight OSP 240 slider up with a 36 PC. Ian exited facing the cable car and completed 3 backflips before deploying at about 4-5 seconds. Upon deploying the bridle entangled with his foot. He turned on his back to clear the entanglement. This put him in a leg high, head low body position. At some point during his attempts, the pins popped and the canopy came out. As the PC continued to pull up wards, the bridle attachment point was pulled flush against his leg, turning the canopy upside down. This horse shoe configuartion prevented the canopy from inflating. He impacted just a few feet from the water still entangled and tumbled into the river. It is noteworthy that prior to this jump, Ian had landed in the river and gotten his gear wet. This extra weight and small PC may have contributed to the incident in two ways. The entanglement may have been the result of an over rotation that resulted from a delayed PC inflation due to it being wet. Further, the extra weight of the parachute due to it being wet, coupled with a relatively small PC for a 4ish second delay might have contributed to the entanglement not clearing in time.